Pilot’s Guide for Models

NGT-9000 NGT-9000R
NGT-9000+ NGT-9000R+
NGT-9000D NGT-9000RD
NGT-9000D+ NGT-9000RD+

Aviation Products
Document Precedence
This Pilot’s Guide provides general information about the operation
of the NGT-9000. Refer to your FAA-approved Airplane Flight Manual
(AFM) and its flight manual supplements for information specific to
your aircraft. If there is conflicting information between the AFM and
this guide, the AFM takes precedence over this guide.
Disclaimer
The term “Lynx NGT-9000” when used in this Pilot’s Guide
encompasses all models unless otherwise stated.

This Pilot’s Guide is subject to change without notice. The illustrations

in this guide are typical for the Lynx NGT-9000.

Screen information may look different on displays interfaced with

the Lynx NGT-9000. Refer to the pilot’s guide for that display for a
description of how information is depicted.

The installation of ADS-B In avionics provides the pilot with

supplemental information and does not replace a pilot’s see-and-
avoid responsibility. This equipment is not approved as a collision
avoidance tool. Any deviation from an air traffic control clearance
based on cockpit information must be approved by the controlling ATC
facility prior to commencing the maneuver. Uncoordinated deviations
may place an aircraft in close proximity to other aircraft under ATC
control not seen on the airborne equipment and may possibly result in
the issuance of a pilot deviation.

ADS-B is currently being deployed throughout the National Airspace

System (NAS). The availability of U.S. ground based transceivers
(GBT) is limited in selected areas. For information regarding the
FAAs system of ADS-B, TIS-B, ADS-R, and FIS-B refer to the FAAs
Aeronautical Information Manual sections 4-5-7 to 4-5-10.

Revision Highlights
Update company contact information.

Pilot’s Guide i
 Pilot’s Guide
Methods and apparatus disclosed and described herein have
been developed solely on company funds. No government or other
contractual support or relationship whatsoever has existed which
in any way affects or mitigates proprietary rights of ACSS® in these
developments. Methods and apparatus disclosed herein may be
subject to U.S. Patents existing or applied for. ACSS® reserves the right
to add, improve, modify, or withdraw functions, design modifications,
or products at any time without notice.
Export Notice
This Pilot’s Guide meets the definition of public domain in
accordance with (22 CFR 120.11 or 15 CFR 734.7-11)
Product Part No.
9029000-20000 (panel mount)
9029000-40000 (remote mount)
Document Part No. 0040-17000-01 (Revision L)
© Copyright 2018
ACSS ®
Refer to the following for additional copyright information:

http://www.l3aviationproducts.com/open-source/

http://www.l3aviationproducts.com/open-source-
software-report/

Trademarks
Lynx ® is a registered trademark of ACSS

The NGT-9000 is covered by one or more of the following

patents: 9,285,472 and 8,736,465. Other patents pending

Aviation Communications and Surveillance Systems (ACSS)

19810 N. 7th Ave.
Phoenix, AZ. 85027-4741
Telephone: (855) 532-7746 Technical Assistance Hotline
(24/7 Service available)
Fax: (623) 445-7001
Email: apsgo@L3T.com
www.ACSS.com
ii Pilot’s Guide
 Table of Contents
Chapter 1: Description
Introduction...................................................................................................1-1
Functional Description..................................................................................1-2
Transponder............................................................................................. 1-3
Transponder Diversity Options................................................................ 1-3
ADS-B System......................................................................................... 1-3
Traffic Display.......................................................................................... 1-4
Traffic Advisory System (TAS)................................................................. 1-4
Traffic Alert and Collision Avoidance System (TCAS).............................. 1-4
ADS-B Traffic Advisory System (ATAS)................................................... 1-4
Weather Display....................................................................................... 1-5
Traffic and Weather Output Interfaces..................................................... 1-5
Built-In Test and Operational Status........................................................ 1-5
TerrainVisionTM......................................................................................... 1-5
Lightning Detection.................................................................................. 1-6
Equipment Description.................................................................................1-7
Required Equipment................................................................................ 1-7
Optional Equipment................................................................................. 1-7
GPS Antenna and Internal GPS Receiver............................................... 1-7
L-Band Antenna....................................................................................... 1-7
Detachable Configuration Module (DCM)................................................ 1-7
Directional Antenna.................................................................................. 1-8
Alternate Displays.................................................................................... 1-8
Personal Electronic Device (PED)........................................................... 1-8
WiFi Serial Adapter.................................................................................. 1-8
CP-2500 Control Panel............................................................................ 1-8
Chapter 2: Operation - Panel Mount
Introduction...................................................................................................2-1
Pilot Advisory................................................................................................2-1
Power On.....................................................................................................2-2
Splash Screen......................................................................................... 2-2
System Status / Versions Screen............................................................ 2-3
Flight ID Screen (optional)....................................................................... 2-3
Normal Operation.................................................................................... 2-4
Basic Operation............................................................................................2-5
Screen Buttons........................................................................................ 2-5
Application Screens................................................................................. 2-7
Left Screen............................................................................................2-7
Right Screen.........................................................................................2-8

Pilot’s Guide iii

 Table of Contents (continued)
Transponder Operation................................................................................2-9
Squawk Code.......................................................................................... 2-9
Current Pressure Altitude....................................................................... 2-10
Flight ID / Call Sign................................................................................ 2-10
Mode Control......................................................................................... 2-10
Transponder Reply................................................................................ 2-10
IDENT Button......................................................................................... 2-10
Squawk VFR Button...............................................................................2-11
MSG Button............................................................................................2-11
ON-GND Indicator..................................................................................2-11
System Test Button.................................................................................2-11
Traffic Operation.........................................................................................2-13
Limitations.............................................................................................. 2-13
Traffic Advisory...................................................................................... 2-13
Traffic Screen......................................................................................... 2-14
Ownship Symbol ................................................................................... 2-15
Traffic Symbols...................................................................................... 2-15
Traffic Display Priority.........................................................................2-18
Traffic Altitude Mode............................................................................2-18
Zoom Buttons........................................................................................ 2-19
Range Rings.......................................................................................... 2-19
TFC Button............................................................................................ 2-19
Transponder Banner.............................................................................. 2-20
Traffic Mode Indicator............................................................................ 2-20
MSG Button........................................................................................... 2-20
Traffic Options Button............................................................................ 2-21
Traffic Options Screen.........................................................................2-21
Options - Status..................................................................................2-21
Options - Settings................................................................................2-22
Acknowledge Button...........................................................................2-23
Selected Traffic Info Button (i)............................................................... 2-23
TIS-B No Coverage Indicator................................................................. 2-23
Traffic Information Window.................................................................... 2-24
Selected Traffic ID................................................................................. 2-24
Selected Traffic GS................................................................................ 2-25
True Track (TRK)................................................................................... 2-25
Aural Announcements................................................................................2-25
Extended Audio Callouts........................................................................ 2-26
Audio Muting.......................................................................................... 2-26
Details on Traffic Operation........................................................................2-27
Automatic Dependent Surveillance - Broadcast (ADS-B)...................... 2-27
Automatic Dependent Surveillance – Re-broadcast (ADS-R)............... 2-28
iv Pilot’s Guide
 Table of Contents (continued)
Traffic Information Service - Broadcast (TIS-B)..................................... 2-29
Traffic Alerting.............................................................................................2-30
ADS-B Traffic Advisory System (ATAS)................................................. 2-31
ATAS Sensitivity Levels.......................................................................2-32
Sensitivity Level A............................................................................2-32
Sensitivity Level B...........................................................................2-32
Traffic Advisory System (TAS) and Traffic Alert and
Collision Avoidance System (TCAS)...................................................... 2-35
TAS/TCAS Sensitivity Levels..............................................................2-35
Sensitivity Level A............................................................................2-36
Sensitivity Level B...........................................................................2-36
Other Aircraft Ground Filtering............................................................2-39
Interference Limiting............................................................................2-39
Weather Operation.....................................................................................2-40
Details on Flight Information Service - Broadcast (FIS-B)..................... 2-40
Auto FIS-B Function.............................................................................. 2-43
FIS-B No Coverage Indicator................................................................. 2-43
FIS-B Graphical Weather Application.................................................... 2-44
Map Elements........................................................................................ 2-44
Information Button (i)...........................................................................2-45
TFR Map Elements..........................................................................2-45
AIRMET and SIGMET Map Elements.............................................2-45
METAR Map Elements....................................................................2-47
REGIONAL NEXRAD Map Elements..............................................2-47
CONUS NEXRAD Map Elements....................................................2-47
Traffic Button.......................................................................................2-48
Zoom Buttons......................................................................................2-48
Display Range Indicator......................................................................2-48
Panning...............................................................................................2-48
North Indicator.....................................................................................2-48
Airport ID Indicator..............................................................................2-48
Orientation Button...............................................................................2-48
Map Options Button............................................................................2-49
On/Off Option Screen..........................................................................2-49
Weather Map Legend Screen..........................................................2-49
Banner ..........................................................................................2-49
Display Area....................................................................................2-51
Declutter Option Screen..................................................................2-51
Weather Map Text Screen...................................................................2-51
Display Area....................................................................................2-51
Banner ..........................................................................................2-52

Pilot’s Guide v
 Table of Contents (continued)
Product Select List Window ............................................................2-52
FIS-B Graphic Winds & Temp Application.............................................. 2-53
Traffic Button.......................................................................................2-53
Aloft Button..........................................................................................2-53
Panning...............................................................................................2-55
Zoom Buttons......................................................................................2-55
Issue Valid Time Indication..................................................................2-55
Ownship Symbol ................................................................................2-55
North Indicator.....................................................................................2-56
Flight Level Selection..........................................................................2-56
FIS-B Textual Application....................................................................2-56
Display Area........................................................................................... 2-56
Banner.................................................................................................2-56
Traffic Button.......................................................................................2-57
Airport Button......................................................................................2-57
Edit Airport ID Window.....................................................................2-57
Favorites Button .................................................................................2-58
Favorites Pick List Window..............................................................2-58
Product Button....................................................................................2-59
Product Pick List Window....................................................................2-59
TAWS Operation.........................................................................................2-60
TerrainVisionTM Option............................................................................ 2-60
Limitations.............................................................................................. 2-61
Defining Terrain Alerts............................................................................ 2-61
Traffic Button.......................................................................................... 2-62
Zoom Buttons........................................................................................ 2-62
Display Range Indicator......................................................................... 2-62
Display Orientation Indicator.................................................................. 2-62
Aural Acknowledge Button..................................................................... 2-62
AGL Altitude Readout............................................................................ 2-63
Ownship Symbol ................................................................................... 2-63
Obstacle Symbols.................................................................................. 2-63
Airport Symbols..................................................................................... 2-64
Airport Symbol Operation....................................................................2-64
TAWS Terrain Color Legend.................................................................. 2-65
Information Button (i)............................................................................. 2-66
TAWS Airport Text Screen...................................................................2-66
TAWS Options Button............................................................................ 2-67
TAWS Options Screen........................................................................2-67
TAWS Display Alerts.............................................................................. 2-67
TAWS Audio Alerts................................................................................. 2-68

vi Pilot’s Guide
 Table of Contents (continued)
500 ft Altitude Callout..........................................................................2-68
Conditions to Trigger Alerts or Callouts................................................. 2-69
Forward Looking Terrain Avoidance (FLTA)........................................2-70
Reduced Required Terrain Clearance (RTC)......................................2-71
Imminent Terrain Impact (ITI)..............................................................2-72
Premature Descent.............................................................................2-73
Ground Proximity Warning System (GPWS) Alerting..........................2-74
Excessive Descent Rate..................................................................2-74
Negative Climb Rate or Altitude Loss After Takeoff.............................2-75
Altitude Loss After Takeoff Graph........................................................2-75
Altitude of 500 ft..................................................................................2-77
Lightning Operation....................................................................................2-78
Traffic Button.......................................................................................... 2-78
Ownship Symbol.................................................................................... 2-79
Zoom Buttons........................................................................................ 2-79
360 View................................................................................................ 2-79
120 View................................................................................................ 2-79
Mode Button.......................................................................................... 2-80
Clear Button........................................................................................... 2-80
Lightning Option Button......................................................................... 2-81
Lightning Settings (View Mode, Stabilization, Status).....................2-81
Heading Stabilization.......................................................................2-82
Strike Rate Indicator.............................................................................. 2-82
Strike Rate Trend Arrow......................................................................... 2-82
Heading Indicator................................................................................... 2-82
Application Indicator / Nearby Strike...................................................... 2-82
Maintenance Mode.....................................................................................2-83
Chapter 3: Operation - Remote Mount
Introduction...................................................................................................3-1
Power On.....................................................................................................3-1
CP-2500 Control Panel................................................................................3-2
Power Off................................................................................................. 3-2
Enter the Squawk Code........................................................................... 3-3
Set Operational Mode.............................................................................. 3-3
View Pressure Altitude............................................................................. 3-4
Set Flight ID............................................................................................. 3-4
IDENT Activation...................................................................................... 3-4
VFR Code Select..................................................................................... 3-5
Set VFR Code.......................................................................................... 3-5
View Info.................................................................................................. 3-5
Traffic Advisory Aural Acknowledge and Reply........................................ 3-6

Pilot’s Guide vii

 Table of Contents (continued)
Enable On Ground TAS/TCAS Operation................................................ 3-6
TAWS Alert Aural Acknowledge............................................................... 3-6
Inhibit TAWS Alert Message..................................................................... 3-6
Inhibit TAWS Obstacles........................................................................... 3-7
Activate Maintenance Self Test ............................................................... 3-7
NGT-9000R Release 1.2...................................................................3-7
NGT-9000R Release 2.0 & 2.1..........................................................3-8
NGT-9000R Release 3.0 & 3.1..........................................................3-9
Display Messages.................................................................................. 3-10
NGT-9000R Release 1.2.................................................................3-10
NGT-9000R Release 2.0 & 2.1........................................................ 3-11
NGT-9000R Release 3.0 & 3.1........................................................3-13
Chapter 4: Controls and Indicators
Introduction...................................................................................................4-1
Cockpit Switches .........................................................................................4-1
IDENT...................................................................................................... 4-1
Audio Acknowledge................................................................................. 4-1
Indicator Lamps............................................................................................4-2
Traffic Advisory.............................................................................................4-2
TAWS Caution......................................................................................... 4-2
TAWS Warning......................................................................................... 4-2
ADS-B Out Fail........................................................................................ 4-2
Alternate Displays........................................................................................4-3
Traffic Display.......................................................................................... 4-3
Other Traffic Symbol ............................................................................4-4
Proximity Advisory Symbol....................................................................4-4
Ownship Symbol...................................................................................4-4
Off-Scale Traffic Advisory (TA) .............................................................4-4
Indicators...............................................................................................4-4
Weather Display....................................................................................... 4-5
WiFi Interface........................................................................................... 4-5
Compatible Control Panel........................................................................ 4-5
Chapter 5: Troubleshooting
Introduction...................................................................................................5-1
General Display Conditions..........................................................................5-1
System Status Messages.............................................................................5-4
Appendix A
Record Of Important Information................................................................. A-1

viii Pilot’s Guide

 List of Illustrations
Figure 1-1: Example of Panel Mount Lynx NGT-9000..................................1-2
Figure 1-2: Example of Remote Mount Lynx NGT-9000..............................1-3
Figure 1-3: Example of Own Aircraft UAT, 1090ES, & TAS/TCAS Traffic.....1-6
Figure 2-1: Example of Splash Screen.........................................................2-2
Figure 2-2: Example of System Status / Version Screens............................2-3
Figure 2-3: Example of Flight ID Screen......................................................2-4
Figure 2-4: Example of Normal Operation....................................................2-4
Figure 2-5 Transponder Application Screen.................................................2-9
Figure 2-6: Squawk Code Edit Screen....................................................... 2-11
Figure 2-7: Example of System Test Screen..............................................2-12
Figure 2-8: Traffic Applications Screen.......................................................2-14
Figure 2-9: Traffic Options Screen - Status................................................2-21
Figure 2-10: Traffic Options Screen - Settings...........................................2-23
Figure 2-11: Example of Traffic Information Window..................................2-24
Figure 2-12: ATAS Traffic Display and Traffic Zone Graphic......................2-33
Figure 2-13: Example of ATAS Predicted Intruder Path.............................2-34
Figure 2-14: Traffic Display Mode and TAS/TCAS Traffic Zone Graphic....2-38
Figure 2-15: FIS Button..............................................................................2-43
Figure 2-16: Weather Map..........................................................................2-44
Figure 2-17: Example of NEXRAD Weather Map.......................................2-47
Figure 2-18: On/Off Options Screen...........................................................2-49
Figure 2-19: Weather Map Legend Screen................................................2-50
Figure 2-20: Declutter Option Screen.........................................................2-51
Figure 2-21: Weather Map Text Screen......................................................2-52
Figure 2-22: Product Pick List Window......................................................2-53
Figure 2-23: Aloft Map Screen....................................................................2-53
Figure 2-24: Winds Aloft Map Elements.....................................................2-54
Figure 2-25: FIS-B Textual Application.......................................................2-56
Figure 2-26: Example of Edit Airport ID Window........................................2-57
Figure 2-27: Example of Favorites Window...............................................2-58
Figure 2-28 Example of Product Pick List Window....................................2-59
Figure 2-29: TAWS Screen.........................................................................2-60
Figure 2-30: TerrainVisionTM Screen...........................................................2-61

Pilot’s Guide ix
 List of Illustrations (continued)
Figure 2-31: TAWS Airport Text Screen......................................................2-66
Figure 2-32: TAWS Options Screen...........................................................2-67
Figure 2-33: Forward Looking Terrain Avoidance (FLTA)...........................2-70
Figure 2-34: Phase of Flight Definitions.....................................................2-70
Figure 2-35: Reduced RTC Alert Condition................................................2-71
Figure 2-36: ITI Alert Condition..................................................................2-72
Figure 2-37: Premature Descent Alert Condition........................................2-73
Figure 2-38: Excessive Descent Rate Alert Condition................................2-74
Figure 2-39: Excessive Descent Rate Graph.............................................2-74
Figure 2-40: Negative Climb Rate or
Altitude Loss After Takeoff Alert Condition.............................2-75
Figure 2-41 Negative Climb Rate Graph....................................................2-76
Figure 2-42: Altitude Loss After Takeoff Graph...........................................2-76
Figure 2-43: Altitude of 500 Feet Callout Condition....................................2-77
Figure 2-44: Lightning Screen 360 View....................................................2-78
Figure 2-45: Lightning Screen 120 View ...................................................2-79
Figure 2-46: Lightning Setting Page...........................................................2-81
Figure 2-47: Maintenance Screens............................................................2-84
Figure 3-1: Example of CP-2500..................................................................3-3
List of Tables
Table 1-1: Model Options.............................................................................1-1
Table 2-1: Button Functions..........................................................................2-5
Table 2-2: Traffic Symbols..........................................................................2-17
Table 2-3: TAS/TCAS Traffic Advisory Situations.......................................2-37
Table 2-4: Description of FIS-B Available Information................................2-41
Table 2-5: Airport Symbols.........................................................................2-46
Table 2-6: Terrain Color Scheme................................................................2-65
Table 2-7: TAWS Display Alerts..................................................................2-68
Table 2-8: Caution & Warning Alert Phrases..............................................2-69
Table 2-9: Required Terrain Clearances for the
Reduced RTC Alert Condition.................................................2-71
Table 2-10: Required Terrain Clearances for the ITI Alert Condition..........2-72
Table 2-11: Lightning Symbols....................................................................2-80
Table 5-1: General Display Conditions
for the Panel Mount Lynx NGT-9000...........................................5-1

x Pilot’s Guide
 List Of Abbreviations and Acronyms
° Degree
AC Advisory Circular
ACSS Aviation Communications and Surveillance Systems
ABV Above
ADS-B Automatic Dependant Surveillance – Broadcast
ADS-R Automatic Dependant Surveillance – Rebroadcast
AFM Airplane Flight Manual
AGL Above Ground Level
AIRB Basic Airborne Situation Awareness
AIRMET Airmen’s Meteorological Information
ALT Altitude
APS Aviation Products Sector
ATAS ADS-B Traffic Advisory System
ATC Air Traffic Control
ATCRBS Air Traffic Control Radar Beacon System
BLW Below
BRT Brightness
CAZ Collision Airspace Zone
CDTI Cockpit Display of Traffic Information
CEL Cell
CLR Clear
CONUS Contiguous United States
CPA Closest Point of Approach
DCM Detachable Configuration Module
dens Antenna Diversity, Extended Squitter,
Enhanced Surveillance, Surveillance Identifier Code
DTIF Display Traffic Information File
DO- RTCA Document
EAR Export Administration Regulations
EGPWS Enhanced Ground Proximity Warning System
EVAcq Enhanced Visual Acquisition
FAA Federal Aviation Administration
FDE Fault Detection and Exclusion
FLTA Forward Looking Terrain Avoidance
FIS-B Flight Information Service - Broadcast
fl Foot-Lambert
ft Feet
ft/min Feet Per Minute
GA General Aviation
GBT Ground Based Transceiver
GALT GPS Altitude
GND Ground
GPWS Ground Proximity Warning System
GPS Global Positioning System
GS Ground Speed
GPWS Ground Proximity Warning System
HAE Height Above Ellipsoid
HPLSBAS Horizontal Protection Level Using SBAS error estimates
HPLFD Horizontal Protection Level using a weighted FDE algorithm
hPa Hectopascals
Hz Hertz
ICAO International Civil Aviation Organization
ID Identification
IDENT Identification
ITI Imminent Terrain Impact
InHg Inches of Mercury
kt/kts Knot (s)
lbs pounds
max Maximum

Pilot’s Guide xi
 List Of Abbreviations And Acronyms (cont.)
METAR Aviation Routine Weather Report
MHz Mega Hertz
MOD Mode
MSG Message
MSS Multilink Surveillance System
NACp Navigation Accuracy Category for Position
NAR Non Altitude Reporting
NAS National Airspace System
NEXRAD Regional and Next-Generation Radar
NIC Navigation Integrity Category
NOTAM Notices to Airmen
NM or nmi Nautical Miles
NRM Normal
OT Other Traffic
PA Proximity Advisory
PAZ Protected Airspace Zone
PALT Pressure Altitude
PED Personal Electronic Device (e.g., tablet)
PIREP Pilot Report
P/N Part Number
R Reply
RAIM Receiver Autonomous Integrity Monitoring
REF Reference
RTC Required Terrain Clearance
RTCA Radio Technical Commission for Aeronautics, Inc.
SBAS Satellite-Based Augmentation System
SIGMET Significant Meteorological Information
SIL Source Integrity Level
SPECI Aviation Special Selected Weather
SPI Special Identification
STBY Standby
STAB Stabalization
STK Strike
SUA Special Use Airspace
SSR Secondary Surveillance Radar
TA Traffic Advisory
TAWS Terrain Awareness and Warning System
TAF Terminal Aerodrome Forecast
TAS Traffic Advisory System
TCAS Traffic Alert and Collision Avoidance System
TFC Traffic
TIF Traffic Information File
TRK Track
TFR Temporary Flight Restrictions
TIS-B Traffic Information Service - Broadcast
TSO Technical Standard Order
UAT Universal Access Transceiver
UNR Unrestricted
VFR Visual Flight Rules
VMC Visual meteorological conditions
WAAS Wide Area Augmentation System
Wx Weather
XPDR Transponder

xii Pilot’s Guide

Lynx ® NGT-9000 Description

CHAPTER 1
DESCRIPTION
INTRODUCTION
The Lynx NGT-9000 family of products are a Mode S Level 2 dens
Class 1 Transponder with an integrated GPS receiver providing
Automatic Dependent Surveillance-Broadcast (ADS-B) output using
1090ES (Extended Squitter). The Lynx NGT-9000 also receive ADS-B
data via 1090ES and UAT (978 MHz Universal Access Transceiver).
The panel mounted version of the Lynx NGT-9000 has a multifunction
touch screen display that allows the user to view transponder, traffic,
and weather information. The touch screen provides the means
to select screen views and interface with transponder, traffic, and
weather displays. See Figure 1-1.
The remote version of the Lynx NGT-9000 provides the same
functionality as the panel mount, but is controlled using a compatible
alternate display or controller. See Figure 1-2.
In addition to ADS-B surveillance, some models of the Lynx
NGT-9000 include an Active Traffic Advisory System (TAS) or Traffic
Alert and Collision Avoidance System (TCAS) as well as support
for antenna diversity. Table 1-1 provides model and part number
information. The TAS/TCAS and Diversity options are software
activated features.

The installed ADS-B Out system has been shown to meet the
equipment requirements of 14 CFR 91.227.

Table 1-1: Model Options

MODEL PART NUMBER TAS/TCAS DIVERSITY REMOTE
NGT-9000 9029000-20000 No No No
NGT-9000+ 9029000-20000 Yes No No
NGT-9000D 9029000-20000 No Yes No
NGT-9000D+ 9029000-20000 Yes Yes No
NGT-9000R 9029000-40000 No No Yes
NGT-9000R+ 9029000-40000 Yes No Yes
NGT-9000RD 9029000-40000 No Yes Yes
NGT-9000RD+ 9029000-40000 Yes Yes Yes

Pilot’s Guide 1-1

Description Lynx ® NGT-9000
FUNCTIONAL DESCRIPTION
The panel mount versions of the Lynx NGT-9000 can display and
control the following information:
• Built-In Test and Operational Status
• Transponder Functions
• Traffic and Weather Output Interfaces
• Diversity (optional, model specific)
• ADS-B System
• Traffic Display
• TAS (optional, model specific)
• ATAS (Release 2.0 and greater, optional)
• TCAS (Release 3.0 and greater, optional, model specific)
Note - The use of TCAS in this Pilot’s Guide refers to a TCAS I
system.
• Weather Displays (enable/disable)
• Graphical Weather
• Winds and Temps Aloft
• Textual Weather Reports
• TAWS, Class B (Release 2.0 and greater, optional)
• TerrainVisionTM (Panel Mount with Release 2.1 and greater,
optional) Note - The use of TERR Advisory is this Pilot’s guide
refers to TerrainVisionTM feature.
• Lightning Detection (Release 2.1 and greater, optional. Panel
mount version only)
The remote mount versions of the Lynx NGT-9000 provides the
same functionality as the panel mount, but is controlled using a CP-
2500 Control Panel (or compatible control panel) and cannot control
lightning detection or display TAWS information (callouts and lights
only). Display information is shown on a optional compatible display
or PED. See Figure 1-2.
The unit has multiple transmit/receive ARINC429, RS-422 and RS-232
data ports used to transmit data to traffic, weather, and PED displays.
The unit provides the transponder code, reply symbol, and mode of
operation to the display.

1200 System Test

ON-GND ALT
ALL
6

-01
00

PALT 12000ft MSG

ID N333TL
Mode Squawk IDENT - -08 00 +
ALT VFR OUT IN

Figure 1-1: Example of Panel Mount Lynx NGT-9000

1-2 Pilot’s Guide
Lynx ® NGT-9000 Description

Figure 1-2: Example of Remote Mount Lynx NGT-9000

Transponder
The transponder function of the Lynx NGT-9000 replies to Mode A,
Mode C and Mode S interrogations on 1030 MHz and transmitting
responses at 1090 MHz. Transponder operation is performed on the
left application screen.
Transponder Diversity Options
The Diversity option requires a specific model of the Lynx NGT-
9000. This feature offers enhanced transponder operation and traffic
awareness via 1090MHz using the ADS-B service. This option requires
the installation of an additional top mounted UAT (L-Band) antenna.

ADS-B System
The ADS-B system used by the Lynx NGT-9000 has the following
capabilities:
• 1090 In - Receives ADS-B, ADS-R and TIS-B
• 1090ES Out - Transmit ADS-B
• UAT In - Receives ADS-B, ADS-R, TIS-B, FIS-B
The Automatic Dependent Surveillance-Broadcast (ADS-B) improves
situational awareness and flight safety by providing real time traffic
information.
The ADS-B In function is used to receive ground station supported
TIS-B and ADS-R traffic, and direct communication with ADS-B out
equipped aircraft.
The ADS-B Out (1090MHz) function is used to periodically broadcast
(without interrogation) information about the aircraft that includes
aircraft identification, position, altitude, velocity and other aircraft
status information.
The Automatic Dependent Surveillance – Re-broadcast (ADS-R) is a
ground based broadcast service that repeats ADS-B messages from
one link (1090ES or UAT) to the other link for aircraft with ADS-B In.

Pilot’s Guide 1-3

Description Lynx ® NGT-9000
Traffic Information Service Broadcast (TIS-B) is a ground based
broadcast service that provides secondary surveillance radar (SSR)
derived traffic data (ATC transponder equipped aircraft not equipped
with ADS-B Out capability) to ADS-B In equipped aircraft.
The Flight Information Services - Broadcast (FIS-B) function provides
pilots with a cockpit display of certain aviation weather and aeronautical
information for awareness of own aircraft location with respect to
reported weather, including hazardous meteorological conditions.
A composite of UAT / 1090ES traffic (UAT, 1090ES, ADS-R, TIS-B,
TAS, and TCAS) is provided in Figure 1-3.

Traffic Display
The Lynx NGT-9000 monitors the airspace around the aircraft using
ADS-B In (and TAS or TCAS if equipped) to show other aircraft on
the screen. When within range of a participating ground station TIS-B
and ADS-R traffic services are also shown on the screen. Traffic is
identified on the screen using corresponding traffic symbols.

Traffic Advisory System (TAS)

The Traffic Advisory System (TAS) is an optional feature of the Lynx
NGT-9000. This feature provides the capability to interrogate nearby
aircraft transponders and issue Traffic Advisory (TA) alert as well as
a voice audio output that announces Traffic Advisories and relative
altitude to the flight crew. This option requires the installation of a
directional antenna.

Traffic Alert and Collision Avoidance System(TCAS)

Release 3.0 or later. The Traffic Alert and Collision Avoidance System
(TCAS) is an optional feature of the Lynx NGT-9000. This feature
provides the capability to interrogate nearby aircraft transponders and
issue Traffic Advisory (TA) alert as well as a voice audio output that
announces Traffic Advisories and relative altitude to the flight crew.
This option requires the installation of a directional antenna.

ADS-B Traffic Advisory System (ATAS)

Release 2.0 or later. The ATAS [also referred to as TSAA] option
provides traffic alerts using ADS-B In (ADS-B, ADS-R, and TIS-B)
traffic information. The TA alerts the flight crew aurally and visually in
a manner similar to a conventional TAS/TCAS which assists the pilot
in the visual acquisition of aircraft that may represent a danger. Traffic
Alerts are graphically depicted on the Lynx NGT-9000 panel mount
units or on compatible external displays. ATAS and TAS or TCAS may
operate at the same time with traffic information being correlated by
the unit. Refer to page 2-31 for details on operation.

1-4 Pilot’s Guide

Lynx ® NGT-9000 Description
Weather Display
The weather displays are optional features setup during installation
and when active are shown on the right application screen. Weather
information is obtained from the FIS−B system which is a ground
broadcast service provided through the ADS−B Services network
over the 978 MHz UAT data link. Three screens are available and are
designated as follows:
• Graphical Weather
• Winds and Temps Aloft
• Textual Weather Reports

Traffic and Weather Output Interfaces

The Lynx NGT-9000 can output traffic information via ARINC 429
and RS-422. Weather information is output via RS-422. Weather and
traffic can be output on RS-232 via WiFi to be viewed on a personal
electronic device.
Built-In Test and Operational Status
The Lynx NGT-9000 uses fault monitoring on all stages of operation
from start up to power down and provides screen messages for
degraded or failed operation. In addition a system test is available
providing operational status of external data inputs.

Terrain Awareness and Warning System (TAWS)

Release 2.0 or later. The Terrain Awareness and Warning System
(TAWS) is an optional function that continuously monitors the aircraft’s
position, altitude, speed, track, and phase of flight and compares the
information to an internal terrain, obstacle, and runway database.
If TAWS predicts a potential Controlled Flight Into Terrain (CFIT)
situation, the system alerts the pilot visually on the Lynx NGT-9000
display, aurally over the cockpit speakers or headset, or via cockpit
lamps (caution & warning).
TerrainVisionTM
Release 2.1 or later. This optional function provides a terrain display
(“TERR Advisory”) similar to the TAWS display but without visual or
audio alerts. This function is not available for the NGT-9000R Remote
Mount version.

Pilot’s Guide 1-5

Description Lynx ® NGT-9000
Lightning Detection
Release 2.1 or later. Lightning Detection is an optional function
provided by the interface of a WX-500 Stormscope. This information
is shown on the right application screen of the NGT-9000 Panel Mount
unit. This function is not available for the NGT-9000R Remote Mount
version.
70 nm (TAS/TCAS)

Other Aircraft 1090ES

30 nm (TIS-B / ADS-R)

Other Aircraft
TAS/TCAS

Own Aircraft

+/- 10000 (TAS/TCAS)

UAT / 1090ES

+/- 3500 ft (TIS-B)

+/- 5000 (ADS-R)
TAS/TCAS
(model option)

ADS-R
Other Aircraft UAT
TIS-B

FIS-B

Other Aircraft
UAT Non-Equipped
Mode A/C Equipped

TIS-B

ATC - Ground Station

Figure 1-3: Example of Own Aircraft UAT, 1090ES, & TAS/TCAS Traffic

1-6 Pilot’s Guide

Lynx ® NGT-9000 Description
EQUIPMENT DESCRIPTION
The Lynx NGT-9000 MSS family consists of the following standard and
optional equipment. Refer to the Aircraft Flight Manual Supplement to
determine what optional equipment is installed. Chapter 5 provides a
list of optional cockpit switches and lamps.
Required Equipment
• GPS Antenna
• L-Band (978MHz/1030/MHz/1090MHz) Antenna
• Detachable Configuration Module (DCM)

Optional Equipment
• Directional Antenna (required for TAS or TCAS operation, and
models with TAS/TCAS and diversity operation)
• Additional L-Band Antenna (required for diversity operation, and
no TAS/TCAS operation)
• Traffic Display
• Weather Display
• WiFi Serial Adapter and Personal Electronic Device (PED)
• CP-2500 (or compatible) Control Panel (required for the remote
mount version)
• WX-500 Stormscope (panel mount version only)
GPS Antenna and Internal GPS Receiver

The GPS utilizes signals from Global Positioning System (GPS)

satellite constellation and Satellite-Based Augmentation Systems
(SBAS). The Lynx NGT-9000 has an internal GPS function that pro-
vides position, velocity, time and integrity (NIC, NAC etc) information
to the applications. The antenna is located on the top of the aircraft.

L-Band Antenna
The L-Band antenna is used by the Lynx NGT-9000 to receive
1030MHz, receive and transmit 1090MHz and receive 978MHz. It is
located on the bottom of the aircraft.
A second L-Band antenna is installed on the top of the aircraft for
models with Diversity. Installations with either TAS or TCAS and
Diversity options use the TAS/TCAS directional antenna instead of
the second L-Band antenna.

Pilot’s Guide 1-7

Description Lynx ® NGT-9000
Detachable Configuration Module (DCM)
The DCM is a solid-state device that retains software and hardware
configuration information. It is permanently attached to the aircraft via
the wiring harness and communicates with Lynx NGT-9000 via serial
bus. Configuration options are set up during installations and saved
in the DCM.
Directional Antenna
A directional antenna is used to receive 1090MHz and transmit
1030MHz for models with TAS or TCAS.

Alternate Displays
Screen information may look different on displays interfaced with the
Lynx NGT-9000. Refer to that displays manual for a description of how
information is depicted.
The operation and display features provided in this Pilot’s Guide are
specific to the information depicted on the Lynx NGT-9000.

Personal Electronic Device (PED)

The Lynx NGT-9000 supports the use of personal electronic devices
(e.g., tablets) via a WiFi connection. The PED must use compatible
applications that support the ADS-B broadcast services (i.e., ADS-B
In, TIS-B, ADS-R, and FIS-B). Check with an avionics dealer or
contact ACSS for a current list of compatible applications.

WiFi Serial Adapter

The Lynx NGT-9000 can be connect to a PED via WiFi using a
compatible WiFi Serial Adapter.

CP-2500 Control Panel

The CP-2500 is a control panel offered by ACSS for operation of the
remote mount Lynx NGT-9000R. The operational information provided
in this guide is limited. Refer to the CP-2500 Pilot’s Guide (0040-
17250-01) for detailed information.

WX-500 Stormscope
The WX-500 is a weather mapping system that detects electrical
discharges from thunderstorms within a 200 nmi radius of the aircraft.
This information plots the location of the thunderstorms and is shown
on the right application screen of the Panel Mount Lynx NGT-9000.

1-8 Pilot’s Guide

Lynx ® NGT-9000

CHAPTER 2
OPERATION - PANEL MOUNT
INTRODUCTION
This chapter describes the operation of the Panel Mount version of the
Lynx NGT-9000. Details on the optional cockpit switches and indicator
lamps are provided in chapter 3.

PILOT ADVISORY
The display of ADS-B data only supplements and does not replace
any operational procedure. All pilots/operators are reminded that the
airborne equipment that displays traffic is only for pilot situational
awareness. This equipment is not approved as a collision avoidance
tool and does NOT relieve the pilot of responsibility to “see-and-avoid”
other aircraft. Any deviation from an air traffic control clearance based
on cockpit information must be approved by the controlling ATC facility
prior to commencing the maneuver. Uncoordinated deviations may
place an aircraft in close proximity to other aircraft under ATC control
not seen on the airborne equipment and may possibly result in the
issuance of a pilot deviation.

• Occasionally the traffic display may show a “shadow” or duplicate

of your own aircraft on the traffic display. Generally this is caused
by a TIS-B track of the aircraft reported from a ground station. In
most cases, the own aircraft TIS-B tracks are detected and filtered
out by the NGT software. In some cases, own aircraft maneuvers
can cause enough separation of the TIS-B track from own aircraft
that it is treated as a new intruder and displayed. This is not an
error or malfunction in the system. As ground stations improve, the
occurrence of these shadows should be minimized or eliminated.
• Ground stations only produce TIS-B intruders for Mode C/S
equipped aircraft that have no ADS-B output. Mode A or non-
transponder equipped aircraft are not reported as TIS-B intruders.
It is the pilots responsibility to “see and avoid”.
• Information shown on the display is provided to the pilot as an aid
to visually acquiring traffic. When under ATC control pilots should
maneuver their aircraft based only on ATC guidance or positive
visual acquisition of the conflicting traffic. Maneuver should be
consistent with ATC instructions. ATC should be contacted for
resolution of the traffic conflict.

Pilot’s Guide 2-1

Operation - Panel Mount Lynx ® NGT-9000
• The transponder signal must be transmitting during all flight and
ground operations. It may be placed in standby only if the system
is inoperable or if advised by ATC to disable ADS-B.
• Loss of input data may not cause the NGT-9000 to fail but could
degrade operation. Failure and degraded conditions will be
annunciated by the NGT-9000 to alert the pilot to the operational
status. In many cases, fault conditions will recover if erroneous
data inputs are restored.
• Aircraft will be displayed when the information received meets
ADS-B, ADS-R, and TIS-B data integrity requirements.

POWER ON
1. Depending on the aircraft use either the battery switches or
avionics master switch to apply power.
2. After power is applied the unit begins initialization and self-tests
begin.
3. When on ground the unit cycles through the following screen
sequence:
• Splash
• System Status / Version
• Flight ID (optional)
• Normal Operation
4. When in air and power is cycled the unit transitions to normal
operation within 5 seconds, bypassing the splash, version, and
flight ID screens.
Splash Screen
The splash screen is displayed in less than 5 seconds after power is
applied. The company name/Logo is shown on the left side and the
product name on the right. See Figure 2-1.

Figure 2-1: Example of Splash Screen

2-2 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
System Status / Versions Screen
The system status is shown on the left screen and should show
“System Pass” in green text along with an audio indication of “System
Test Passed”. The version screen is located on the right side and
shows the software and database version information. See Figure 2-2.

System Status Versions

Power On Result: System Pass Flight Sw: 0000-00000-XXYZ
GPS/UAT RX: _ _ _ _ _ _ _
Airport DB: YYYYMMDD
Map DB: YYYYMMDD
TAWS DB: YYYYMMDD

Figure 2-2: Example of System Status / Version Screens

• If System Status is “System Fail”, then the message “Self-Test

Failures Occurred” is shown on the right side of the display and the
“System Test Failed” is heard through the aircraft audio system.
The option to restart the unit or to continue start up in a degraded
mode is shown on the right side of the display
• Tap the Restart button to restart the system.
• If the “System Fail” message continues to be seen tap the
Continue button to proceed. Refer to Chap. 5 (Troubleshooting)
for corrective actions.
• If System Status is “System Degraded”, then the message “See
MSG Window” is shown on the right side of the display.
• Tap Continue button to proceed. Refer to Chap. 5
(Troubleshooting) for corrective actions.

Flight ID Screen (optional)

The Flight ID Screen is a configuration option that must be setup during

installation. Most general aviation aircraft will be operated in a manner
that does not require Flight ID. See Figure 2-3. It is shown after the
System Status/Version Screen and shows the following information:

• Use Tail # (call sign) button, located in the upper left, may be
tapped to be activated in place of a Flight ID.

Pilot’s Guide 2-3

Operation - Panel Mount Lynx ® NGT-9000
• The Flight ID Number is entered using the keypad. For Release
1.x/2.x the keypad will change to numbers after three alpha
characters are entered. For Release 3.x or later tap the “123”, “A-M”
or “N-Z” button to change the keyboard buttons as needed. When
complete, tap the Done button to proceed to normal operation.
• The last Flight ID entered is shown after power is cycled.
• The Flight ID can be changed using the Flight ID Button in the
options setting.

Release 1.x and 2.x

Release 3.x
Figure 2-3: Example of Flight ID Screen

Normal Operation
Figure 2-4 shows an example of the unit in normal operation. When the
aircraft is on ground the System Test button and ON-GND indication
are shown. Functional instructions are located in the Basic Operation
section below.

1200 System Test

ON-GND ALT
ALL
6

-01
00

PALT 12000ft MSG

ID N333TL
Mode Squawk IDENT - -08 00 +
ALT VFR OUT IN

Application Indicators
Figure 2-4: Example of Normal Operation

2-4 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
BASIC OPERATION
The touch screen display is divided into left and right screens that
show information specific to the selected application. The user can
select, input, and adjust information on the screen using buttons,
edit boxes and screen objects using gestures (actions) such as tap,
momentary press, drag, or swipe.
Screen Buttons
The buttons are used to select, input, and adjust screen information.
The buttons have the following common functionality:
• Buttons are typically gray background color with white or green
text.
• The shape of a button can vary according it’s location.
• The button background highlights in blue when pressed.
• A button function that is inhibited has its button label grayed out.

Table 2-1 provides examples of screen buttons, edit boxes, and other
screen objects and their functionality.

Table 2-1: Button Functions

NAME - FUNCTION EXAMPLE

Momentary Button: Use a tap action
on the momentary button to perform a Done
onetime function
Latch Button: Use a tap action on the
latch button to set a single function to Settings Status
On or Off. Once pressed the button Not Selected - Selected
retains the latched appearance
indicating that it is active.
Toggle Button: The toggle button is
Mode Mode
used to control related functions of
ALT ALT
which only one may be active at a
time. Performs a onetime action when Not Selected - Selected
pressed that changes the selected
indicator located at the bottom of the
button. The background is blue only
while pressed.

Pilot’s Guide 2-5

Operation - Panel Mount Lynx ® NGT-9000
Table 2-1: Button Functions (continued)

NAME - FUNCTION EXAMPLE

Radio Button: The radio button is used
to control related functions of which Above Above
only one may be active. The circular Not Selected - Selected
button indicator is bright green when
the button function is active and is
dark when not active.
Options Button: The gear shaped
options button is used to access
options available for the application
screen. Tap the button to open the list Not Selected - Selected
of options. The gear is blue only while
pressed.

Brightness Button: Used to increase

or decrease the display brightness
level. Tap the button to open a slide
bar. The button is blue only while Not Selected - Selected
pressed.
Scroll Bar: The scroll bar is used to Scroll Bar
Position Indicator
navigate vertically through a list or
block of text. Use a drag or swipe
action to move the scroll bar.

Slider Bar: A slider bar is used to Slide Bar

Position Indicator
increase or reduce a value. Use a drag
or swipe action to move the slider bar.

Options Tab: The Options Tab is

comprised of at least two latch buttons
and a “Done” momentary button. It is
used on the application option screens Settings Status Done
to select between two “pages” of
information by tapping on the desired
page name on the tab.

2-6 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
Table 2-1: Button Functions (continued)

NAME - FUNCTION EXAMPLE

Selection List: Selection Lists are
used where there is a list of items
from which a selection can be made.
A green filled circle is shown when
an item is selected. A drag or swipe
action is used to scroll the list up or
down.
Message Window: The message Message Text
Self-Test Failures
window is used when a system Function Activate
Buttons Occured!

message is present that requires a Restart Continue

user response. Two function active
buttons can be arranged in a row
below the message text.
On/Off Button: This button is used to
indicate whether a function is enabled
(green) or disabled (dark).

Application Screens
The display is divided into left and right screens with each screen
having access to a particular application. An Application indicator is
located at the bottom of each screen. The indicator shows the number
of available applications for that side of the display as well as the
current application setting. Each application can slide into view using
both Drag and Swipe actions. See Figure 2-4.
Left Screen
The left screen has two application indicators. The first indicator (from
left to right) corresponds to the Transponder the second indicator
corresponds to Alternate Traffic.
The Transponder screen Displays Mode A Squawk Code, Pressure
Altitude, Flight ID or Call Sign (tail number).
The Alternate Traffic screen displays a Birds-eye display of traffic and
own-ship compliant with the requirements of AC 20-172B and DO-
317B for the purpose of supporting the Enhanced Visual Acquisition
(EVAcq) and Basic Airborne (AIRB) CDTI applications.

Pilot’s Guide 2-7

Operation - Panel Mount Lynx ® NGT-9000
Right Screen
The right screen has between two and six application indicators. The
number of indicators is dependent on the feature enablement.

The two screens that are always available are the Traffic and the
FIS-B Graphical Data Screen.

The Traffic Birds-eye display of traffic and ownship for the purpose
of supporting the Enhanced Visual Acquisition (EVAcq) and Basic
Airborne (AIRB) CDTI applications. This includes display of traffic
advisories, when installed and enabled (TAS, TCAS, or ATAS Optional).

The FIS-B Weather Graphic screen is a simplified moving map display

with depiction of ownship and the ability to selectively overlay graphical
FIS-B products such as METAR, TAF, NOTAMs, AIRMET, SIGMETs,
TFR and NEXRAD.
The following four screens are dependent on the feature enablement:
TAWS (or Terrain Display Only - No Alerting), Lightning, FIS-B
Graphical Winds and Temps Aloft, and FIS-B Textural Data.

The Terrain Awareness and Warning System screen displays a birds-

eye display of terrain, obstacles, airports, and ownship for the purpose
of supporting a Class B TAWS. Release 2.1 or later also includes an
option for Terrain Display only with No Alerting.

The Lightning screen displays electrical discharges from thunderstorms

within a 200 nmi radius of the aircraft. This Lightning data depicted as
cells or strikes. A “Nearby Strike Indicator (lightning bolt)” is shown
over the lightning application Dot when storm activity is detected.

The FIS-B Weather Graphic Winds & Temp Aloft screen is a simplified
moving map display with depiction of ownship and the ability to
selectively overlay winds and temps aloft at the desired flight level.

The FIS-B Weather Textual Data screen displays airport associated

textual products provided by FIS-B including METAR, TAF, NOTAMs.
The application indicators and their screens have the following order
(from left to right) when enabled: Traffic, TAWS, Lightning, FIS-B
Graphic Data, FIS-B Graphical Winds & Temps Aloft, and FIS-B
Textual Data.

2-8 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
TRANSPONDER OPERATION
The transponder receives interrogations from surrounding aircraft and
from ATC and then transmits replies.
Ground stations can interrogate Mode S Transponders individually
using a 24-bit ICAO Mode S address, which is unique to the particular
aircraft. In addition, ground stations may interrogate the unit for its
transponder data capability and the aircraft’s Flight ID.
The transponder application is the first screen on the left side of the
display as indicated by the application indicator. See Figure 2-5 and
the functional description below for operating instructions.
Release 2.1 or later. An external Standby Mode switch and pilot
option to enable or disable the “Squawk VFR” button is available. See
Chapter 4 for details on Transponder screen and operation changes.

Transponder Active Function Button

IDENT or Reply Message (On Ground Only)
Mode A
Squawk
Code

1200 System Test

I
D
E
N
T
Pressure ON-GND ON-GND
Altitude Indication
Flight ID PALT 12000ft MSG Message
or ID N333TL Button
Call Sign
Mode Squawk IDENT IDENT
ALT VFR Button

XPDR Mode Squawk Button

Control Application Indicator
Figure 2-5 Transponder Application Screen
Squawk Code
When the Squawk Code text is tapped, the Squawk Code Edit Screen
is shown. See Figure 2-6. The current Squawk Code continues to be
transmitted until the last digit of the new Squawk Code is entered. The
edit mode is canceled by tapping the Squawk Code before the fourth
digit is entered, or after 5 seconds of inactivity, or if a Traffic Advisory
or TAWS Alert occurs.

Pilot’s Guide 2-9

Operation - Panel Mount Lynx ® NGT-9000
Current Pressure Altitude
The current pressure altitude (PALT) is located below the Squawk
Code. A value greater than 99,900 ft will set the value to 99900 with
amber text. An invalid pressure altitude is shown as amber dashes.

Flight ID / Call Sign

The Flight ID or Call Sign (tail number) is located below the PALT.
During initial installation either the tail number is setup to be shown
or the Flight ID can be set each flight using the Flight ID screen
(configuration option).

Mode Control
The Mode Control toggle button has the following selections: Standby
(Sby), On, and Altitude (Alt).

• ALT is the default mode. It puts the transponder in ATC

mode C. When the aircraft is In-Air the transponder replies to
interrogations and includes the plane’s pressure altitude in the
replies.
The transponder should be in this setting when In-Air or On-
Ground unless otherwise directed by ATC.
When On-Ground, the display includes an “ON-GND” indication.
While On-Ground the transponder does not reply to Mode C/S All-
Call interrogations and outputs ADS-B at a slower surface rate.
• Selecting Standby stops all transponder transmission.
• Selecting ON puts the transponder in ATC mode A in which it
replies to interrogations, but does not report the plane’s altitude.
A “FAIL” message, in amber text, is shown if a transponder failure is
detected.

Transponder Reply
When the transponder (XPDR) reply is active an “R” indicator is shown
to the right of the Squawk Code. The “R” is replaced with “IDENT”
when the IDENT button is tapped.

IDENT Button
Tap the IDENT button to transmit the Special Identification (SPI) pulse.
An IDENT pulse highlights the aircraft’s symbol on the ATC’s radar
screen and is identified on the screen next to the squawk code.
2-10 Pilot’s Guide
Lynx ® NGT-9000 Operation - Panel Mount
Squawk VFR Button
Tap the Squawk VFR toggle button to change the transponder squawk
code to a predefined (1200) VFR value. The value shown on the button
is the code that is activated when the button is tapped. A second press
reverts the transponder to the previous squawk code.
Gain access to the Squawk Code Edit Screen from the Traffic page as
follows: Tap the Options (the Gear symbol), Settings, and VFR Code
button. See figure 2-6.
Release 2.1 or later. The Squawk button can be removed from the
transponder screen. Do this by entering the edit screen and tapping
the Enabled button. The buttons green light turns gray and is shown
as “Disabled”.
Cancel Done
0 1
VFR Code
2 3
1200 X
4 5
ENABLED 6 7

Figure 2-6: Squawk Code Edit Screen

MSG Button
If a new message is available a flashing MSG button is shown on the
left screen. Tap the MSG button to view fail or degraded messages
during normal operation.
Once the messages in the message window have been viewed, the
MSG button will stop flashing. When all messages have cleared, the
MSG button is removed from the screen. On the Message window tap
the Done button to return to the previously viewed screen.
Refer to the Chap. 5 (Troubleshooting) for corrective actions.

ON-GND Indicator
The ON-GND indicator provides the pilot a notification that the
transponder is operating in the on-ground mode (does not reply to
all-calls).

System Test Button

The System Test button is available only when the aircraft is on the
ground. Tapping the button initiates the Test. During the System Test
the user functions are disabled and the right screen shows a preset
traffic display with the message “Self Test In Progress” at the top of the
screen. See Figure 2-7.
Pilot’s Guide 2-11
Operation - Panel Mount Lynx ® NGT-9000
System Status Self Test In Progress
ADS-B In: Pass 6
+10
ADS-B Out: Pass
Transponder: Pass -10
FIS-B: Fail
TAS: Pass
ATAS: Pass -02
TAWS: Degraded

Figure 2-7: Example of System Test Screen

The left screen shows the system affect of the tests results on the
functional areas of the system.
Note – Release 1: Functions that are not part of the installation
are not shown. Release 2.0 or later: TAS, ATAS, and TAWS are
listed with a “disabled” indication if not installed. Release 3.0 or
later: TCAS is listed with a “disabled” indication if not installed.
FIS-B is removed from the list if it is disabled.
Note - Individual test failures are recorded in the fault log. (Accessible
to service personnel only.)
The unit returns to normal operation if no failures are detected within
5 seconds.
• If a “Fail” or External Fail” is shown for any of the system functions,
then the message “Self-Test Failure” is shown on the right side of
the display as well as the option to restart the unit or to continue
operation in a degraded mode.
• Tap the “Restart” button to reset the unit and once it is operational,
perform the System Test again. If the failures continue tap the
“Continue” button to proceed in a degraded operational mode.
• If “Degraded” is shown for any of the system functions, then the
message “Service Unit Soon” is shown on the right side of the
display.
• Tap Continue screen button to proceed.
Correct failures before going any further with the functional check.
Note: It is normal to show degraded for certain functions if some
aircraft systems are still aligning, or if the GPS has not yet acquired
a signal.
• On the Transponder Screen, tap the “MSG” button located on the
Transponder Application screen to view fail messages.
• Check signal availability when failures for ADS-B In, FIS-B, GPS,
TAS, or TCAS are noted.
• Refer to the Chap. 5 (Troubleshooting) for corrective actions.

2-12 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
TRAFFIC OPERATION
The Lynx Multi-Link Surveillance System monitors the airspace
around the aircraft using ADS-B In (and TAS/TCAS if equipped) to
communicate with like equipped aircraft with ADS-B Out and shows
these other aircraft on the screen. When within range of a participating
ground station TIS-B and ADS-R traffic services are also shown on the
screen. Traffic is identified on the screen using corresponding traffic
symbols. Refer to the descriptions below and Figure 2-8 for detailed
information.
Limitations
• The ADS-B, ADS-R, TIS-B, TAS, and TCAS traffic information
assists the pilot in visually acquiring traffic while airborne and is
expected to improve both safety and efficiency by providing the
pilot with enhanced traffic awareness. This functionality does not
relieve the pilot of “see and avoid” responsibilities as described in
14 CFR 91.113b.
• Traffic information shown on the Lynx NGT-9000 is dependent
on other aircraft having similar ADS-B equipment, or a Mode A/C
transponder for models with TAS/TCAS, or being in range of a
ground station that provides TIS-B and ADS-R. If another aircraft
cannot meet these requirements, then the other aircraft will not be
displayed on the Lynx NGT-9000.
• The EVAcq, AIRB, and ATAS functions are unavailable when
ownship position is beyond 85 degrees North or South latitude.
The result is a display of “Traffic Unavailable” on Panel mount units
and an indication of “Standby” for remote displays. However, for
NGT-9000 installations, where TAS or TCAS is enabled, the range/
bearing based TAS/TCAS targets are displayed.
• Some Aircraft may be equipped with an external CAWS or TAWS
type system that has higher priority audio annunciation that will
delay traffic or terrain alerts.
Traffic Advisory
The TAS, TCAS, and ATAS functions are optional features providing
advisories via aural announcements over the cockpit speakers or
headset and visually via the display or a cockpit lamp. ATAS and TAS
or TCAS may operate at the same time with traffic information being
correlated by the Lynx NGT-9000. Details on these features are shown
in “Traffic Alerting” on page 2-30.

Pilot’s Guide 2-13

Operation - Panel Mount Lynx ® NGT-9000
Traffic Screen
The traffic screen has a black background. Transponder Mode can be
set to Standby (SBY), On (ON), or Altitude (ALT).
The Traffic application is available on both the left and right screen.
The Traffic information is shown if ADS-B, TAS, TCAS data is valid.
A “Traffic Failed” is displayed if both ADS-B and TAS/TCAS (optional)
are failed. “Traffic Unavailable” is displayed if ADS-B In has no heading
or track available and TAS/TCAS (if installed) is in standby. See
Figure 2-8 for an example of Traffic Screens. Refer to the Functional
Description below for detailed information.
If TAS, TCAS and ATAS options are configured and the traffic screen
is not being displayed on either the left or right screen and a traffic
advisory occurs, the traffic screen automatically opens on the right
screen if there is no TAWS Alert (option) active and will open on the
left screen if a TAWS alert is active.

Transponder Mode
Selected Range Options
Transponder Selected Selected Indication Button
Banner Traffic GS Traffic ID Traffic Info Button

XPDR 1200 On i
6
N333TL
i 6 150 kts
00
N333TL
150 kts
MSG ALT
00 NRM -01
ALT -01
NRM TAS TAS
STBY STBY
-
Out
-08 00 +
In
-
Out
-08 00 +
In

Traffic Mode Indicator Zoom In

Altitude Directional Ownship Zoom Out Acknowledge Button
Mode
Circle indicates symbol is selected TIS-B No Coverage Indicator
TIS-B No Coverage Indicator

Figure 2-8: Traffic Applications Screen

2-14 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
Ownship Symbol
The ownship is shown as a white triangle on the traffic display. When
ownship direction source is not valid the ownship symbol is a white
circle with a black inset. Ownship orientation matches ownship
heading when available or track angle if heading is not available.

Traffic Symbols
The traffic symbols indicate the approximate range, relative bearing,
and relative altitude of intruder aircraft. Traffic data with directional
data for intruder aircraft are shown as arrowheads. Traffic data without
directional data for intruder aircraft are shown as diamonds.
• A solid amber circle (or with a black filled arrowhead) is a Traffic
Advisory (TA) that represents an intruder aircraft that may pose a
collision threat. (A semi-circle at the edge of the display represents
an off-scale TA).
• Units with the optional TAS or TCAS feature (e.g., NGT-9000+ or
NGT-9000R+) display traffic advisory symbols and output aural TA
warnings (Release 1 “traffic, traffic” or Release 2.0 or later “Traffic”
with the other aircraft clock position) that are annunciated over the
cockpit speaker or headset. Note - Optionally available extended
call-outs including the relative attitude and range (low, 5 miles).
This is a configurable option selected at the time of installation.
• Units with the optional ATAS feature (Release 2.0 or later)
display traffic advisory symbols and output aural TA warnings
(“Traffic” along with the other aircraft clock position) that
are annunciated over the cockpit speaker or headset.
Note - Optionally available extended call-outs including the relative
attitude and range (low, 5 miles). This is a configurable option
selected at the time of installation.
• A solid diamond or arrowhead is a Proximity Advisory (PA) that
represents traffic that is close but does not pose an immediate
collision threat.
• A hollow diamond or arrowhead indicates Other Traffic (OT) that
represents traffic that does not pose an immediate threat.
• Directional intruders are oriented such that symbols point in the
direction of their reported heading or track, relative to own aircraft
direction.

Pilot’s Guide 2-15

Operation - Panel Mount Lynx ® NGT-9000
• A velocity vector arrow may be appended to the right side of a
traffic symbol to indicate that the intruder aircraft is ascending (up
arrow) or descending (down arrow) faster than 500 fpm. No arrow
is shown for intruder aircraft in level flight, or for those moving
vertically slower than ±500 fpm, or for non-altitude-reporting
intruder aircraft.
• A two digit number may be appended to traffic symbols to indicate,
in hundreds of feet, the relative altitude of the intruder. For example
+03 means the intruder aircraft is 300 ft above ownship. A positive
data tag is displayed above the traffic symbol to emphasize that
the intruder aircraft is above your aircraft. A negative data tag is
displayed below the traffic symbol. If the intruder is at the same
altitude as the aircraft, “00” is displayed below the traffic symbol.
The data tag for a vertically out of range TA displays the relative
altitude of the intruder regardless of the current vertical display
mode. Only display data tags for altitude reporting aircraft are
shown. Non-altitude reporting aircraft are considered to be at the
same altitude as ownship.
• Tapping a traffic symbol generates a circle around it indicating that
the traffic symbol is selected. In addition the following is displayed:
Selected Traffic Info Button, Selected Traffic ID, and if enabled the
Selected Traffic Ground Speed (GS). Tap the traffic symbol again
to remove the circle and data. Once an aircraft is selected, more
data (if available) can be seen by tapping the “i “ button.
• When TAS/TCAS functionality is enabled and in installations with no
heading source, the TAS/TCAS traffic (referenced to the heading/
nose of the aircraft) and ADS-B traffic (referenced to track) are
displayed simultaneously. The ADS-B targets will therefore appear
skewed by the crab angle of the aircraft.
• When TAS/TCAS functionality is enabled and in installations with
no heading source, low speed operations (< 7 knots) will result in
a removal of the ADS-B tracks because ownship track can not be
adequately determined. TAS/TCAS Only text will appear on the
display if TAS/TCAS is enabled. This can happen in both rotorcraft
hover operations and when fixed wing/rotorcraft aircraft are on-
ground.
See Table 2-2 for a list and description of traffic symbols used by the
panel mount unit.

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Lynx ® NGT-9000 Operation - Panel Mount

Table 2-2: Traffic Symbols

SYMBOL DESCRIPTION - EXAMPLE
Airborne Directional Traffic Advisory (TA)
(TAS, TCAS, or ATAS option only)

Airborne Directional Proximity Advisory (PA) *

Airborne Directional Other Traffic (OT) *

(Panel mount only)

Airborne Non-directional (TA)

(TAS, TCAS, or ATAS option only)

Airborne Non-directional (PA) *

Airborne Non-directional (OT) *

On Ground Directional (OT)

Ground Vehicle Directional

On Ground Non-directional (OT)

Ground Vehicle Non-directional

Airborne Directional TA Traffic symbol with a data

tag indicating a relative altitude of 100ft below with a
horizontal velocity vector. (Panel mount only)
-01
Airborne Directional Other Traffic symbol with a data
tag indicating a relative altitude of 800ft below own
-08 aircraft descending with a horizontal velocity vector.
(Panel mount only)

* To promote cockpit commonality, installation configuration options

are available to set the airborne PA & OT traffic color to either cyan
or white.

Pilot’s Guide 2-17

Operation - Panel Mount Lynx ® NGT-9000
Traffic Display Priority
When multiple intruders are displayed, some overlapping of symbols
and/or data may occur. In these instances, the intruder with the
greatest threat partially or completely overlaps the intruders that pose
lower threats. Threat levels are calculated based on the intruders’
proximity, heading, altitude, and speed.
Traffic is displayed on the screen using the following priority scheme:

1. TAS/TCAS Traffic Advisories

2. ATAS Traffic Alerts
3. Selected Traffic
4. Proximate Advisories
5. Other Traffic

Traffic Altitude Mode

The available Traffic Altitude Modes are shown on a Toggle button
with green text. The altitude ranges are in relation to the ownship. A
description of each mode is detailed below:

• Normal (NRM): Traffic is displayed from altitudes of between

-2,700 and +2,700 ft. This mode is typically used during the
enroute phase of flight to reduce screen clutter.
• Above (ABV): Traffic is displayed from altitudes of between
+9,000 and -2,700 ft. This mode is typically used during takeoff.
• Below (BLW): Traffic is displayed from altitudes of between
+2,700 and -9,000 ft. This mode is typically used during approach
and landing.
• Unrestricted (UNR): Traffic is displayed from altitudes of between
+9,900 and -9,900 ft. This mode is typically used during the
enroute phase of flight to show all aircraft within the entire
detection area.
The Altitude Mode button is available only when the status of the
aircraft is In-Air. When the aircraft status is On-Ground the altitude
mode button is replaced with the TFC button.
See Figure 2-8 for a graphic representation of the Traffic Display
Modes and Traffic Zones.

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Lynx ® NGT-9000 Operation - Panel Mount
Zoom Buttons
Zoom In (+) and Zoom Out (-) buttons are located on the bottom of
each traffic screens. The buttons are used to change the traffic display
range.
Range Rings
The range rings are oriented around the ownship. A range indicator is
located outside the upper left corner of the outer most ring. Bearing
indicators are shown on the 2 nm range ring. The range ring setting is
controlled by the zoom buttons.

The Traffic screen has the following display range with additional inner
rings as noted:

• Range 40 has 40 nm and 24 nm range rings.

• Range 24 has 24 nm and 12 nm range rings.
• Range 12 has 12 nm and 6 nm range rings.
• Range 6 has 6 nm and 2 nm range rings.
• Range 2 has only the 2 nm range ring.
• Range 1 has only the 1 nm range ring.
• Range 0.5 has only the 0.5 nm range ring.
TFC Button
The Traffic (TFC) button replaces the Traffic Altitude Mode button
when the status of the aircraft is On-Ground. The button also activates
TAS/TCAS (optional) when the aircraft is On-Ground. A description of
each mode is detailed below:
• Ground (GND): The display shows ADS-B ground traffic only and
places TAS/TCAS (if installed) in Standby. TAS or TCAS Standby
indication is located on the Traffic Mode Indicator. This is the
default mode when the aircraft goes on ground.
• Air (AIR): The display shows air traffic only and activates TAS/
TCAS (if installed).
• All (ALL): The display shows air and ground traffic and activates
TAS/TCAS (if installed).
Note
When no heading source is available and when going
through low speed operations (< 7 knots), ADS-B tracks
are removed because ownship track can not be adequately
determined. If TAS/TCAS is not active, a “Traffic Unavailable”
message is displayed.

Pilot’s Guide 2-19

Operation - Panel Mount Lynx ® NGT-9000
Transponder Banner
When the traffic application is displayed on the left screen, the
transponder banner is displayed at the top of the left screen with the
following information:
• Quick return button is labeled “XPDR” and is used to return to the
Transponder Application screen
• Mode A squawk code
• Reply “R” or Ident “ID” indicator shown to the right of the squawk
code when either function is active.
• Current transponder operating mode status indicator with green
text. An amber “XPDR Failed” is shown when the transponder
function has failed.

Traffic Mode Indicator

The Traffic Mode Indicator is available only when a Lynx NGT-9000
with TAS/TCAS is installed. Otherwise the “ADS Only” is assumed to
be operating for non-TAS or non-TCAS installs.
The indicator is located above the Zoom in (+) button. The possible
modes of operation are detailed below:
• TAS STBY: This mode is shown if the TAS is in standby.
• TAS Only: This mode is shown if the TAS is operating and ADS-B
traffic is not available.
• TCAS STBY: This mode is shown if the TCAS is in standby.
• TCAS Only: This mode is shown if the TCAS is operating and
ADS-B traffic is not available.
• ADS Only: This mode is shown if TAS/TCAS has failed (or not
available) and ADS is operating.
A “Traffic Failed” message is shown with amber text when all available
traffic functions have failed. This results in all the traffic symbols being
removed from the traffic screen.
A “Traffic Unavailable” is shown with white text when insufficient
information is available to display traffic. This results in all the traffic
symbols being removed from the traffic screen.
MSG Button
The MSG Button seen on the Traffic Screen has the same functionality
as the one shown on the Transponder screen. See page 2-11 for
details.

Traffic Options Button

The gear shaped Options Button is located in the upper right corner of
the right application screen. Tap the button to open the options screen.
2-20 Pilot’s Guide
Lynx ® NGT-9000 Operation - Panel Mount
Traffic Options Screen
Two latch buttons and a done button are located on the bottom. The
Status button opens a screen showing GPS satellite information. The
Settings button opens a screen allowing the setting of Initial Traffic
Altitude Mode, VFR Squawk Code, Display Brightness Trim, and Flight
ID (if configured). Tap the Done button to close the Options Screen.
Options - Status
See Figure 2-9. The status screen provides the following GPS
information:
• 24 Bit ICAO ID (Mode S Identifier): This value is displayed in octal
format.
• NACp (Navigation Accuracy Category for Position): This value is
determined using HFOM data.
• NIC (Navigation Integrity Category): this value is determined
using HPL data.
• Navigation Solution Mode (GPS), possible indications are:
• “No Pos” - unknown or DR [Insufficient Satellites to compute a
position]
• “2D” - 2D Nav, no integrity [Sufficient satellites to compute a
lateral position, but not to compute either HPLSBAS or HPLFD]
• “3D” - 3D Nav, no integrity [Sufficient satellites to compute a
lateral and vertical position, but not to compute either HPLSBAS
or HPLFD]
• “FDE” - RAIM/Alt (aided integrity) [HPLFD computed using
barometric altitude aiding is valid]
• “WAAS” - RAIM [HPLSBAAS is valid or HPLFD computed
without using barometric altitude aiding is valid]
• “Error” - SVERROR (trying to exclude) [Fault detection detects
a position failure which cannot be excluded within the time-to-
alert when integrity is being provided by FDE]

Figure 2-9: Traffic Options Screen - Status

Pilot’s Guide 2-21

Operation - Panel Mount Lynx ® NGT-9000
• SIL: This value is always 3. Displayed GPS Satellite information is
shown as horizontal bars in increasing numerical order. The bars
are green-filled for greater signal strength and gray-filled when
no signal is detected. The bars should be at least 40-50% green-
filled .
• Latitude and Longitude data: Shows the GPS computed own
aircraft latitude/longitude in degrees, minutes, seconds.
• Release 2.0 and earlier. GPS Altitude (GALT): Shows the GPS
computed own aircraft altitude (Height Above Ellipsoid (HAE) in
feet.
• Release 2.1 or later. GPS Altitude (GSL): Shows the GPS computed
own aircraft altitude (Height Above Geoid). -Approximate MSL-
Not to be used for navigation)
• HFOM (Horizontal Figure of Merit): An indication of the quality of
the GPS position for horizontal position data.
• VFOM (Vertical Figure of Merit): An indication of the quality of the
GPS position for vertical position data.
If no valid data is available for the GPS data a white dash is inserted.

Options - Settings
The Settings screen provides the following information and
functionality: See Figure 2-10.
• Radio buttons to set the traffic altitude mode (Normal, Above, and
Unrestricted). This selects the default altitude mode used when
the aircraft goes in-air. This is also used as the altitude mode
when on the ground and the “TFC” button has selected “AIR” or
“ALL”.
• Display Brightness Trim button “BRT” is used to open a slide bar
to adjust the screen brightness up or down from the automatic
brightness control setting. This is trim adjustment not a 0 to 100%
control.
• The VFR Code button is a means to update the default VFR
code to use when the “Squawk VFR” button is pressed on the
transponder application screen. Tap the button to go to a VFR
Code edit screen to set a new VFR code. This should typically be
set to 1200 for use in the USA. Release 2.1 and greater an option
to disable the VFR button is available. See page 2-11 for details.
• A Flight ID toggle button is shown if configured. Tap the button to
open the Flight ID Edit screen. The ID edit screen can be used to
update the FLT ID or allows you to revert to tail number.

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Lynx ® NGT-9000 Operation - Panel Mount

VFR Code FLT ID

1200 AAA 1234
Initial Traffic Altitude Mode: BRT

Normal Above Unrestricted

Status Settings Done

Figure 2-10: Traffic Options Screen - Settings

Acknowledge Button
The Acknowledge Button is located on the right side of traffic screen
and appears as a speaker icon. It is only available if extended callout
option was setup during installation. The acknowledge button is
available when the optional TAS, TCAS, or ATAS function is configured
and after a traffic advisory is detected.
Tap the button to silence the aural part of the current traffic alert. The
button is then removed from the screen until another alert occurs.

Note - Some aircraft may be equipped with a yoke or panel mounted

acknowledge button that performs the same function.

Selected Traffic Info Button (i)

The selected traffic info button appears on the left side of both the left
and right screen after a traffic symbol is pressed. When the button is
tapped a traffic information window is located over the top of the traffic
screen. See Figure 2-11.

TIS-B No Coverage Indicator

When configured to be enabled (required in the U.S.), the indicator
is located next to the Zoom Out button and is shown when TIS-B /
ADS-R data is not available in the area (i.e. out of range of a ADS-B
ground station).

• The indicator is also shown if a problem exists with the NGT-9000

System. See the troubleshooting section.
• The indicator will not be shown when TAS/TCAS (if installed) is
operational (i.e. installed, not failed, not in standby).

Pilot’s Guide 2-23

Operation - Panel Mount Lynx ® NGT-9000
Traffic Information Window
The window is shown over the traffic screen and provides the following
data and functionality:
• Flight ID of the selected aircraft.
• Emitter Category or “type” of aircraft.
• An aircraft Icon is located on the right side of the window showing
a representation of the aircraft being tracked. If there is no aircraft
icon available then:
• Release 2.0 or earlier: A “?” is shown.
• Release 2.1 or later: A text indication of the source of the traffic
is shown (TIS-B, TAS, ADS-R, or ADS-B and TCAS for Release
3.0 or later).
• Calculated ground speed of the selected aircraft.
• A Display GS Latch button is used to activate the selected Traffic
GS on the traffic screen.
• Tap the Done button to close the window. The window is also
removed from the screen if a Traffic Advisory or TAWS Alert is
detected.
• See Figure 2-11 for an example of the Traffic Information Window.

Information

FLT ID: N123CD

Type: Small
GS: 105kts

Display GS Done

Figure 2-11: Example of Traffic Information Window

Selected Traffic ID
The Selected Traffic ID is located along the right side of the traffic
screens after a traffic symbol is pressed. The Traffic ID is removed
when the selected traffic symbol is tapped, a Traffic Advisory (TA)
occurs, or if the selected traffic is no longer being tracked. The Traffic
ID is restored to the screen if the Traffic Advisory is no longer present
and if no other user action (i.e., selecting a different traffic symbol,
tapping a button, or changing the zoom range) has occurred since the
Traffic Advisory occurred. See Figure 2-8.

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Lynx ® NGT-9000 Operation - Panel Mount
Selected Traffic GS
The Selected Traffic GS (if configured) is located along the right side
of both screens (under the selected traffic ID) after a traffic symbol is
pressed. The Traffic GS is removed when the selected traffic symbol
is tapped, a Traffic Advisory (TA) occurs, or if the selected traffic is no
longer being tracked. The Traffic GS is restored to the screen if the
Traffic Advisory is no longer present and if no other user action (i.e.,
selecting a different traffic symbol, tapping a button, or changing the
zoom range) has occurred since the Traffic Advisory occurred. See
Figure 2-8.

True Track (TRK)

This indication is located on the lower right side of the traffic screen
when a heading source is configured as an input, but the heading
source is not operational.

AURAL ANNOUNCEMENTS
Aural Traffic Advisories are provided by the optional TAS, TCAS, or
ATAS function.
“Traffic, Traffic” (or “Traffic”& aircraft clock position Release 2.0 or later)
is a normal aural component of a traffic advisory is announced once
over the cockpit speakers or headset when a TA is first detected. This
aural announcement can be silenced using the audio acknowledge
buttons. It may also be delayed if a higher priority alert is occurring at
the time of the alert.
Do not rely solely on the aural alerts for intruder aircraft
information. Use the display to view the latest TA and aircraft
information.
Units with the TAS/TCAS feature Aural announcements are only
made when the TA first occurs and may be silenced by the audio
acknowledge button.
Units with the ATAS feature have 2 alert level or “zones”. The Protected
Airspace Zone (PAZ) and the Collision Airspace Zone (CAZ). Alerts
may be generated for both of these alert zones so one TA aircraft may
generate 2 alerts for ATAS.

Pilot’s Guide 2-25

Operation - Panel Mount Lynx ® NGT-9000
Extended Audio Callouts
The Extended Audio Callouts is a configuration option that adds relative
bearing, relative altitude (when available) and range to the intruder
information announced as well as the normal alert (or relative altitude,
range, and vertical sense for Release 2.0 or later) It is available to the
TAS, TCAS, and ATAS functions.
• The relative bearing provides a clock bearing (e.g. “12 O’clock).
• The relative altitude (if available) announces either “High” if > 50 ft
or “Low” if < -50 ft or “Same Altitude” if > -50 ft and < 50 ft of own
altitude).
• The range in nautical miles is either slant range if TA is Altitude
Reporting or flat range if TA is not Altitude Reporting (NAR).
• Release 2.0 or later:
• The Vertical Sense (if available) announces either:
• “Climbing” if vertical climb rate is >= 500 fpm
• “Descending” if vertical descent rate is >= 500 fpm
• “Level” if vertical rate is < 500 fpm
Some examples of extended audio alerts are:
• Release 1 “Traffic, Traffic, 10 O’clock high, 5 miles” This
aural announcement is for an intruder at a relative bearing of 300
degrees, at a higher altitude, 5 miles away.
• Release 2.0 or later “Traffic, 6 O’clock same altitude, less than
a mile, level” This aural announcement is for an intruder at a
relative bearing of 180 degrees, at the same altitude, less than a
mile away, flying level.

AUDIO MUTING
Audio may be silenced in the following ways:
• Some Aircraft may be equipped with an external CAWS or TAWS
(i.e., stall warning > Terrain Alert > Traffic Avoidance) type system
that has higher priority audio annunciation that will delay traffic or
terrain alerts.
• (Release 2.0 or later) Press the external mounted Audio
Acknowledge Button (located on the yoke or panel) to silence the
current aural announcement.

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Lynx ® NGT-9000 Operation - Panel Mount
• (Release 2.0 or later) Tap the Acknowledge Button on the Lynx
NGT-9000 traffic display to silence the current aural announcement.
• (Release 2.1 or later) Configuration Options “TAS Ground Filtering”:
(1-standard) Aural traffic alerts from TAS functions are suppressed
when the ownship is at or below 1700 ft AGL and the intruder is
below 380ft AGL (above ground level). (2-alternate) Aural Traffic
Alerts suppressed when the ownship is at or below 1700 ft AGL and
the intruder is below 5ft AGL (instead of 380 ft AGL). For Release
3.0 this configuration also applies for TCAS.
• No traffic alerts are generated for aircraft that are on-ground even
though ground-based symbols are displayed by ADS-B.
DETAILS ON TRAFFIC OPERATION
Operational details for ADS-B, ATAS, ADS-R, and TIS-B are provided
below. This information is being provided to help in the understanding
of the Lynx NGT-9000 ADS-B traffic system .
Automatic Dependent Surveillance - Broadcast (ADS-B)
ADS-B improves situational awareness and flight safety by providing
real time traffic information. The ADS-B In function is used to
receive ground station supported TIS-B and ADS-R traffic, and
direct communication with nearby like equipped aircraft (with Mode
S or UAT). The ADS-B Out (1090ES) function is used to periodically
broadcast (without interrogation) information about the aircraft that
includes aircraft identification, position, altitude, velocity and other
aircraft status information.
• ADS-B does NOT relieve the pilot of responsibility to “see-and-
avoid” other aircraft.
• No avoidance maneuvers are provided for, nor authorized, as a
direct result of a ADS-B other aircraft being displayed in the cockpit.
Avoidance maneuvers must be based on visually acquiring the
target
• The traffic display shows the relative position of ADS-B or standard
traffic using text, shapes, and colors. ADS-B also provides similar
information on ADS-B equipped ground vehicles.
• The effective surveillance range is 60 nmi (ADS-B In) The passive-
mode surveillance range is 160 nmi and maintains report messages
for a minimum of 200 1090ES ADS-B participants and 300 UAT
ADS-B participants simultaneously. To reduce display clutter a set
number of other aircraft of the highest priority other aircraft are
displayed at a time.
Pilot’s Guide 2-27
Operation - Panel Mount Lynx ® NGT-9000
Automatic Dependent Surveillance – Re-broadcast (ADS-R)
ADS-R is a ground based broadcast service that repeats ADS-B
messages from one link (1090 MHz or 978 MHz) to the other link for
aircraft with ADS-B In.
• ADS-R does NOT relieve the pilot of responsibility to “see-and-
avoid” other aircraft.
• No avoidance maneuvers are provided for, nor authorized, as a
direct result of a ADS-R other aircraft being displayed in the cockpit.
Avoidance maneuvers must be based on visually acquiring the
target.
• The actual availability of services depends upon both the availability
of a ground station to support ADS-R source data and aircraft being
within range of the ground station.
• ADS-R transmissions are updated at least every 2 seconds on the
surface, 5 seconds in the terminal area, and 10 seconds in the en-
route airspace.
• Other aircraft are provided by the ground station if within a 15 nm
horizontal range and +/-5,000 ft of altitude of the receiving aircraft.
ADS-B equipped ground aircraft and vehicles are not displayed to
airborne aircraft.
• An aircraft on the ground receiving ADS-R is provided both ground
aircraft and vehicles as well as airborne other aircraft within 5nm
and 2,000 ft above ground level of the airport reference point.
• Receiving aircraft must be in both ATC radar coverage and ground
based transceiver (GBT) coverage in a given area to receive
ADS-R service in that area. ADS-R range is larger than the TIS-B
range of 24,000 ft above station.

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Lynx ® NGT-9000 Operation - Panel Mount
Traffic Information Service - Broadcast (TIS-B)
TIS-B is the broadcast from Ground Radio Stations of ATC derived
traffic information to ADS-B equipped aircraft.
• The actual availability of TIS-B source data depends upon the
availability of ground-based radar.
• Receiving aircraft must be in both ATC radar coverage and ground
based transceiver (GBT) coverage in a given area to receive
TIS-B service in that area. When ownship is above 24,000 ft, the
ground station will no longer provide TIS-B service. (Targets will be
provided up to 27,500 ft when ownship is at 24,000 ft)
• Other aircraft are provided by the ground station if within a 15nm
horizontal range and +/-3,500 ft of altitude of the receiving aircraft.
ADS-B equipped ground aircraft and vehicles are not displayed to
airborne aircraft.
• Aircraft not equipped with a transponder, or equipped with a Mode
A only transponder are not part of the TIS-B data and will not be
seen on the traffic display.
• The ground station will not provide display information for Mode
C and Mode S transponder equipped aircraft that do not provide
altitude information.
• An aircraft on the ground receiving TIS-B is provided both ground
aircraft and vehicles as well as airborne other aircraft within 5nm
and 2,000 ft above ground level of the airport reference point.
• The TIS-B service is intended to improve the pilot’s ability to
visually see traffic in the air and on the airport surface so that pilots
can more effectively apply traditional “see-and-avoid” techniques.
• TIS-B does NOT relieve the pilot of responsibility to “see-and-
avoid” other aircraft.
• No avoidance maneuvers are provided for, nor authorized, as a
direct result of a TIS-B other aircraft being displayed in the cockpit.
Avoidance maneuvers must be based on visually acquiring the
target.

Pilot’s Guide 2-29

Operation - Panel Mount Lynx ® NGT-9000
TRAFFIC ALERTING
The Lynx NGT-9000 has three traffic alerting methods available.

• The Traffic Advisory System (TAS) and Traffic Alert and Collision
Avoidance System (TCAS) options require a specific model of
the Lynx NGT-9000. TAS/TCAS is an active traffic system that
interrogates nearby aircraft transponders. The TCAS option is
available for Release 3.0 or later.
• The ADS-B Traffic Advisory System (ATAS) option provides
traffic alerts using ADS-B In (ADS-B, ADS-R, and TIS-B) traffic
information. This feature is available for Release 2.0 or later.
Each system alerts the flight crew aurally and visually which assists the
pilot in the visual acquisition of aircraft that may represent a danger.
ATAS and TAS/TCAS may operate (if installed) at the same time with
traffic information being correlated by the unit. ATAS alerting has the
highest priority if using ADS-B or ADS-R, but TAS/TCAS has priority if
ATAS is using TIS-B.

Each of the traffic alerting systems share the following operational

details:

• Traffic information is graphically displayed on the NGT-9000+ or

alternate display.
• The system display shows the relative position of traffic using text,
shapes and colors.
• The system uses an audio output that announces Traffic Advisory
and relative bearing, relative altitude and range.
• Alerts are generated first from ADS-B data, then by TAS/TCAS
data (if aircraft is equipped with the NGT-9000+), and lastly by
TIS-B data (if available). ATAS alerting is superimposed over
TAS/TCAS alerting providing suppression of nuisance TAS/TCAS
alerts. If other aircraft are being tracked only by TAS/TCAS, then
TAS/TCAS alerting is used.
• An optional discrete output (traffic alert lamp) may be used to
indicate a traffic advisory (TA) has been detected.
• All other aircraft that may be displayed that do not meet the criteria
of a TA or PA are classified as Other Traffic (OT).

2-30 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
• For Software earlier then 3.0 Sensitivity Level A is an area
within 10 nm of an airport which is also identified as the Airport
environment or terminal area. The Lynx NGT-9000 defines an
airport environment as an airport with a runway with at least 500
ft of hard surface. Any airport without those specifications (e.g.
runway with grass or <500ft long) will not be shown on the traffic
screen, but will be categorized as a sensitivity level A.
• For Software 3.0 and later Sensitivity Level A uses ownship AGL
altitude when ownship is < 2,000 AGL or < 120 knots, rather than
airport elevation.
• Sensitivity Level B is the area outside the airport environment
which is also identified as the enroute area.
ADS-B Traffic Advisory System (ATAS)
The ADS-B Traffic Advisory System (ATAS) aurally and visually alerts
the flight crew to nearby aircraft and assists in the visual acquisition of
aircraft that may present a danger. See Figure 2-12.

ATAS is a dynamic system that uses two protected zones of airspace

(i.e. CAZ, PAZ) around ownship to generate alerts. The Collision
Airspace Zone (CAZ) has a constant detection zone. The Protected
Airspace Zone (PAZ) predicts the path of intruder aircraft and alerts the
flight crew that the intruder aircraft will enter the path of the ownship.
See Figure 2-13 for an example.

• The dimensions of CAZ is fixed at 500 ft. horizontal radius and

+/- 200 ft. relative altitude.
• The dimension of PAZ is dependent on closure rate. The PAZ
dimension decreases as closure rate decreases with a minimum
750 ft. horizontal radius and +/- 300 ft. (Sensitivity A) or +/- 500 ft.
(Sensitivity B) relative altitude.
• The tracking of aircraft traffic is in a cylindrical volume centered
on own aircraft with a maximum radius of 20 nmi and extending
10,000 ft. above and 10,000 ft. below ownship.
• ATAS will track up to 60 intruder aircraft simultaneously.
• A Traffic Advisory (TA), Proximate Advisory (PA), and Other Traffic
(OT) are issued only when the ownship aircraft status is in air.
• Aircraft that are within a range of 6 nmi of ownship with a vertical
distance of +/- 1200 ft (if altitude is reporting) are identified as a
Proximate Advisory (PA).

Pilot’s Guide 2-31

Operation - Panel Mount Lynx ® NGT-9000
The following information provides details for issuing traffic alerts. See
Figure 2-13.

• A TA is issued when an intruder aircraft comes within the CAZ

area of the ownship.
• A TA is issued at least 35 seconds prior to Closest Point of
Approach (CPA) when no acceleration in intruder and ownship.
• A TA is issued at least 12.5 seconds prior to the CPA with intruder
aircraft when intruder aircraft are within Sensitivity Levels A and
B of the ownship.
• A TA symbol remains on the screen for at least 8 seconds unless
the respective track is terminated.

ATAS Sensitivity Levels

The A or B sensitivity level is used to determine when to display a TA
within Protected Airspace Zone (PAZ). Having two sensitivity levels
allows the unit to reduce the number of nuisance TAs during takeoff
and landing (Sensitivity Level A), and to maximize the detection of TAs
during the cruise phase of flight (Sensitivity Level B).
Sensitivity Level A
Sensitivity level A (terminal area) uses the following criteria for
displaying a TA:
1. Ownship has a valid altitude < 2,000 ft. Above Ground Level
(AGL) or an invalid ownship altitude with a valid ground speed of
< 120 kts.
2. Alerts at least 12.5 seconds prior to Closest Point of Approach
(CPA) within 750 ft. horizontally and +/- 300 ft. vertically.
3. No alerts are issued if the intruder aircraft CPA is >0.5 nm
horizontally or 500 ft. vertically.
Sensitivity Level B
Sensitivity level B (enroute area) uses the following criteria for
displaying a TA:
1. Ownship has a valid altitude > 2,000 ft. Above Ground Level
(AGL).
2. Alerts at least 12.5 seconds prior to Closest Point of Approach
(CPA) within 750 ft. horizontally and +/- 500 ft. vertically.
3. No alerts are issued if the intruder aircraft CPA is >2.0 nm
horizontally or 850 ft. vertically.
2-32 Pilot’s Guide
Lynx ® NGT-9000 Operation - Panel Mount
20 nm

Not To Scale

6 nm +/- 1,200 ft

Sensitivity Level B (PAZ) 750 ft PAZ +/- 500 ft

Sensitivity Level A (PAZ) 750 ft PAZ +/- 300 ft

Intruder
(CAZ) 500 ft CAZ +/-200 ft
Aircraft
Intruder
Ownship
Aircraft
+/-10,000 ft
Pr Pa
ed th

k
ac
ict

Tr
ed

– Traffic Advisory (TA) directional) Sensitivity Level A and B Alert at

– Traffic Advisory (TA) Non-directional) least 12.5 seconds to CPA
Area outside of Sensitivity Level A
– Proximity Advisory (PA) directional) and B Alert at least 35 seconds to
– Proximity Advisory (PA) Non-directional) CPA when no acceleration in
intruder aircraft and ownship.
– Other Traffic (OT) directional) A TA is issued when the predicted
– Other Traffic (OT) Non-directional) path of an intruder aircraft enters
the ownship PAZ or CAZ area.
CPA = Closest Point of Approach
CAZ = Collision Airspace Zone
PAZ = Protected Airspace Zone

Figure 2-12: ATAS Traffic Display and Traffic Zone Graphic

Pilot’s Guide 2-33

Operation - Panel Mount Lynx ® NGT-9000

Time = 0s Time = +15s Time = +35s

T = Time
Future Z

PAZ dimension decreases

Intruder as closure rate decreases
Aircraft The PAZ is actually
1 calculated for the entire
length of the trajectory.
Predicted PAZ penetration
PAZ results in an alert
CAZ beginning with Time = 0.
Predicted Path

Ownship

Intruder
Aircraft
2

Predicted path
results in no PAZ
penetration. No
alert issued.

Figure 2-13:Example of ATAS Predicted Intruder Path

2-34 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
Traffic Advisory System (TAS) and Traffic Alert and Collision
Avoidance System (TCAS)
TAS and TCAS is an active system that interrogates transponders
(aircraft to aircraft) in the surrounding airspace similar to ground based
radar. When replies to these active interrogations are received, the
responding aircraft’s range, altitude, and closure rates are computed
to plot traffic location and predict collision threats. The NGT-9000+ or
NGT-9000R+ alerts the flight crew to nearby transponder equipped
aircraft and assists the pilot in the visual acquisition of aircraft that
may represent a danger. Table 2-3 summarizes the criteria necessary
to display a traffic advisory. Figure 2-14 shows the TAS/TCAS Traffic
Zone Graphic.
• The effective active-mode surveillance range is 35 nmi and
track 35 ATCRBS intruders simultaneously with the other aircraft
bearing relative to the nose of own aircraft.
• The tracking of other aircraft is in a cylindrical volume centered
on own aircraft with a maximum radius of 35 nmi and extending
10,000 ft above and 10,000 ft below own aircraft.
• A TA symbol remains on the screen for at least 8 seconds, even if
the intruder aircraft no longer meets the TA criteria, as long as the
Lynx NGT-9000 continues to track the aircraft.

TAS/TCAS Sensitivity Levels

The A or B sensitivity level is used to determine when to display a
TA. Having two sensitivity levels allows the unit to reduce the number
of nuisance TAs during takeoff and landing (Sensitivity Level A), and
to maximize the detection of TAs during the cruise phase of flight
(Sensitivity Level B).

Pilot’s Guide 2-35

Operation - Panel Mount Lynx ® NGT-9000
Sensitivity Level A
Sensitivity level A (terminal area) consists of two criteria for displaying
a TA:

1. The intruder aircraft enters into an area of airspace surrounding

ownship defined by a 0.2 nmi horizontal radius and a height of
±600 ft from ownship
2. The intruder aircraft approaches ownship on a course that will
intercept ownship within 15 or 20 seconds (within 15 seconds for
a non-altitude reporting intruder aircraft; within 20 seconds for an
altitude reporting intruder aircraft).

The unit uses sensitivity level A in the following situations (corresponds

to numbers 1, 2, 7, and 8 in Table 2-3):

1. For Software earlier then 3.0 Sensitivity Ownship has a valid AGL
(above ground level) altitude and is below 2,000 ft AGL. Note -
The unit calculates height above terrain using GPS Altitude and
nearest airport elevation.
For Software 3.0 and later Sensitivity Level A uses ownship AGL
altitude when ownship is < 2,000 AGL or < 120 knots, rather than
airport elevation.
2. Ownship AGL Altitude is Invalid, and ownship ground speed is
available or is less than 120 knots.

Sensitivity Level B
Sensitivity level B (enroute area) consists of two criteria for displaying
a TA:

1. The intruder aircraft enters into an area of airspace surrounding

ownship defined by a 0.55 nmi horizontal radius and a height of
±800 ft from ownship.
2. The intruder aircraft approaches ownship on a course that
intercepts ownship within 20 or 30 seconds (within 20 seconds for
a non-altitude reporting intruder aircraft; within 30 seconds for an
altitude reporting intruder aircraft).

The unit uses sensitivity level B when the criteria for Sensitivity Level
A has not been met. (Corresponds to numbers 3, 4, 5 and 6 in Table
4-1).

2-36 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
Table 2-3: TAS /TCAS Traffic Advisory Situations

NO. OWN OWN SHIP OTHER AIRCRAFT IS

SHIP ALT GND SPEED DETECTED

1 Within a 0.2 nmi horizontal

Below radius and a +/- 600 ft relative
2000 ft altitude.
AGL
2 Within 15-20 sec of CPA *
3 Within a 0.55 nmi horizontal
Above radius and a +/- 800 ft relative
2000 ft altitude.
AGL
4 Within 20-30 sec of CPA *
5 Available and Within a 0.55 nmi horizontal
> to 120 knots radius and a +/- 800 ft relative
altitude.
Has in-
6 valid AGL Within 20-30 sec of CPA *
Altitude
7 Available and Within a 0.2 nmi horizontal
< 120 knots radius and a +/- 600 ft relative
altitude.
8 Within 15-20 sec of CPA *

Sensitivity Level A Sensitivity Level B

* CPA means Closest Point of Approach

** Ground speed is not available whenever the GPS navigation
information is not available.

Pilot’s Guide 2-37

Operation - Panel Mount Lynx ® NGT-9000

Not To Scale

Up to 35 nmi +9900ft

Up to 35 nmi +9000 ft

Up to 35 nmi +2700 ft

4 nmi +1200 ft
Look Up (ABV)

0.55 nmi +800 ft

Unrestricted (UNR)

0.2 nmi +600 ft

Normal (NRM)

TAS & TCAS Sensitivity Level A *

This area or 20 seconds to CPA
0 ft
Look Down (BLW)

–600 ft
TAS/TCAS I Sensitivity Level B **
This area or 30 seconds to CPA

–800 ft

–1200 ft

–2700 ft

–9000 ft

–9900 ft

*15 seconds for non-altitude reporting intruder aircraft (TAS & TCAS Only)
**20 seconds for non-altitude reporting intruder aircraft (TAS & TCAS Only)

– Traffic Advisory (TA) (airborne directional) – Traffic Advisory (TA) (airborne Non-directional)
– Proximity Advisory (PA) (airborne directional) – Proximity Advisory (PA) (airborne Non-directional)
– Other Traffic (OT) (airborne directional) – Other Traffic (OT) (airborne Non-directional)

CPA = Closest Point of Approach

Figure 2-14: Traffic Display Mode and TAS/TCAS Traffic Zone Graphic

2-38 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
Other Aircraft Ground Filtering
If the ownship is at or below 1700 ft AGL, the traffic Advisory system
(TAS) or TCAS will not display or calculate alerts for other aircraft which
are determined to be on ground (not airborne). Intruders determined
to be below 380 ft AGL are considered to be on ground and will not be
output with the TAS/TCAS active traffic output.
(Release 2.1 or later) Configuration Option “Ground Filtering Altitude”:
The on ground (alternate) determination can be set for 5ft (instead of
380 ft AGL).

NOTE
Since the Lynx NGT-9000 also receives ADS-B traffic
information, aircraft no longer under TAS/TCAS surveillance
may still be displayed based on the received ADS-B traffic
data.

Interference Limiting
To assure that interference effects from active TAS/TCAS equipment
are kept to a minimum, the FAA requires TAS/TCAS equipment to
“interference limit,” i.e. reduce its transmit power, when it is operating
in congested airspace. This limiting function is based on the number
of TCAS interrogators detected via Mode S broadcast reception and
the reply rate of the aircraft transponder. Interference limiting reduces
the effective surveillance range of the TAS/TCAS equipment and is
independent of the display range selected.

NOTES
1. Selected display range has no affect on the surveillance
range of the TAS/TCAS.
2. This interference limiting function is for active TAS/
TCAS and does not affect the range at which ADS-B
reporting traffic will be received. It also does not limit the
range at which the Lynx NGT-9000 ADS-B output will be
received by other aircraft.
3. Dual TAS/TCAS and ATAS operation where aircraft
tracked by both alerting systems will alert based on the
ATAS system. Aircraft tracked only by TAS/TCAS in
this scenario will still alert according to the TAS/TCAS
rules.

Pilot’s Guide 2-39

Operation - Panel Mount Lynx ® NGT-9000
WEATHER OPERATION
The Lynx NGT-9000 provides weather information using data
provided by the Flight Information Service - Broadcast (FIS-B). The
FIS-B service is available only from a ground station that is in range to
aircraft equipped with UAT receivers.

The FIS-B broadcast provides a graphical and textual display of

weather and aeronautical information. This information is provided
on three different application screens named below as “Graphical
Weather Application”, “Graphic Winds and Temps Application”, and
Textual Application”. This information is detailed below. The map
orientation is typically shown as north up.

Alternate weather displays and PEDs may show the weather data
differently than what is shown in this pilot’s guide. Refer to the display
operation manual or PED application information for details.

Details on Flight Information Service - Broadcast (FIS-B)

FIS−B is a ground broadcast service provided through the ADS−B

Services network over the 978 MHz UAT data link. By using FIS−B
for orientation and information, the usefulness of information received
from official sources may be enhanced, but the user should be alert
and understand any limitations associated with individual data.
The weather data listed in Table 2-4 is available on specific application
screens as detailed below.

FIS−B augments the traditional ATC/FSS/ AOCC services by providing

additional information and in some cases the advantage of being
displayed graphically. The data provided by FIS−B is for information
only and does not meet the safety and regulatory requirements of
official weather data.

2-40 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
Table 2-4: Description of FIS-B Available Information

PRODUCT DESCRIPTION

AIRMET Text/graphical report - Airmens Meteorological Infor-

mation is a weather advisory issued by a meteorolog-
ical watch office. It provides an advisory of potentially
hazardous condition exists for low-level aircraft and/
or aircraft with limited capability. Compared to SIG-
METs, AIRMETs cover less severe weather: moder-
ate turbulence and icing, surface winds of 30 knots,
or widespread restricted visibility.
METAR Text reports − Surface meteorological data. Includes
airport identifier, time of observation, wind, visibility,
runway visual range, present weather phenomena,
sky conditions, temperature, dew point, and altimeter
setting. Remarks may be appended to the end.
NEXRAD, Graphical report - Next-Generation Radar is a na-
Regional tionwide network of high resolution Doppler weather
radars, which detect precipitation and atmospheric
movement or wind. It returns data which when pro-
cessed can be displayed in a mosaic map which
shows patterns of precipitation and its movement.
The “Regional NEXRAD” FIS-B product is a com-
posite of available NEXRAD radar imagery in a local
area, showing a more detailed image than the “CO-
NUS NEXRAD” product.
NEXRAD, Graphical report - The “CONUS NEXRAD” FIS-B
CONUS product is a summary composite of available NEX-
RAD radar imagery across the 48 states.
NOTAM Text/graphical report - Notice To Airmen is creat-
ed and transmitted by government agencies under
guidelines specified by Annex 15: Aeronautical Infor-
mation Services of the Convention on International
Civil Aviation. A NOTAM is filed with an aviation au-
thority to alert aircraft pilots of any hazards En Route
or at a specific location. The FIS-B NOTAM product
consists of NOTAM-Ds and NOTAM-FDCs (including
TFRs).

Pilot’s Guide 2-41

Operation - Panel Mount Lynx ® NGT-9000
Table 2-4: Description of FIS-B Available Information (continued)

PRODUCT DESCRIPTION

SIGMET Text/graphical report − Potentially hazardous en

route phenomena such as thunderstorms and hail,
turbulence, icing, sand and dust storms, tropical cy-
clones, and volcanic ash in an area affecting 3,000
square miles or an area deemed to have a significant
effect on safety of aircraft operations.

SIGMET, Text/graphical report - hazardous thunderstorms

Convective and related phenomena across Continental US.
Convective SIGMETs issued for thunderstorms
and related phenomena do not include with thun-
derstorms such as turbulence, icing, low level wind
shear and IFR conditions.
TAF Text report - Terminal Aerodrome Forecast is a format
for reporting aviation weather forecast information.
Generally a TAF is a 9- or 12-hour forecast, though
some TAFs can cover an 18- or 24-hour period. TAFs
complement and use similar encoding to METAR
reports. They are produced by a human forecaster
based on the ground. For this reason there are fewer
TAF locations than there are METARs. TAFs can be
more accurate than Numerical Weather Forecasts,
since they take into account local, small scale, geo-
graphic effects.

Winds and Graphical report - Winds and Temperature Aloft Fore-

Tempera- cast is forecast for specific atmospheric conditions in
tures Aloft terms of wind and temperature in a specific altitude
measured mostly in feet (ft) above mean sea level
(MSL). The forecast is specifically used for aviation
purposes.

2-42 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
Auto FIS-B Function

When configured for Auto FIS-B, the Winds & Temps and FIS-B textual
data screens are initially deactivated and the FIS-B No Coverage
Indicator is disabled. The Winds & Temps and FIS-B textual data
screens are activated and the FIS-B No Coverage Indicator enabled
when FIS-B weather messages have been detected. When FIS-B is
in operation a button is present on the screen that is used to disable/
enable FIS-B function. See Figure 2-15.

Figure 2-15: FIS Button

FIS-B No Coverage Indicator

When configured to be enabled the indicator is located at the bottom
center of the screen and is shown when No FIS-B data is available
in the area (i.e. out of range of a ADS-B ground station). See Figure
2-16.
• The indicator is also shown if a problem exists
with the NGT-9000 System. See the troubleshooting section.
When configured to be disabled, the Winds & Temps and FIS-B textual
data screens are deactivated and the FIS-B No Coverage Indicator is
disabled.

Pilot’s Guide 2-43

 Operation - Panel Mount Lynx ® NGT-9000
FIS-B Graphical Weather Application
The Graphical Weather Application is located in the second screen
position (or third screen position when TAWS is enabled, Release
2.0 or later) as indicated by the Application Indicator. The Graphic
Application is a simplified moving map with depiction of ownship and
the ability to selectively overlay graphical FIS-B products such as,
NEXRAD, METAR, and SIGMET. See Figure 2-16.

Traffic Button Selected Airport Options Button

Symbol Symbol

Information
Orientation
Button Button

Selected Airport
ID Indicator

North
Indicator

Zoom Time No Coverage Display Range Zoom

Out Stamp Indicator Indicator In

Figure 2-16: Weather Map

Map Elements
FIS-B weather products are overlaid on the map. The viewing of
weather products is controlled by the declutter range selected on the
Options Screen.
• Tap to select Product overlaid map elements.
• The selected map elements are highlighted in a yellow outline.
• A tap of an empty area of the map de-selects the map element.
• Only one map element can be selected at a time and may be
selected when panning is active or not.
• The map is normally centered on the ownship symbol when
panning is not activated. When panning is active the viewing area
is repositioned to that selected by the pilot.
• The directional ownship symbol is a white triangle that is a reference
point that corresponds to the ownship position.
• The ownship symbol is a white circle if direction data is not
known.

2-44 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
• The land masses are black. Bodies of water are dark blue. Depiction
of NEXRAD weather radar data is overlaid on the map. Map areas
where NEXRAD data has not been received are indicated using
a gray semi-transparent graphical overlay. This will cause land
masses to appear grey and water to appear light blue when no
graphical NEXRAD data is available.
• Country and State borders are solid light gray lines.
• Major roads are depicted as solid gray lines for display ranges less
than or equal to 200 nm.
• Cities are shown on the map in small white text centered on the
cities location. The display ranges of cities are dependent on the
size of the city as follows: Large and medium sized cities are shown
at less than or equal to 200 nm. Small cities are shown at less than
or equal to 50 nm.
• The symbol for the different types of airports are described in Table
2-5. Soft surfaced airports are shown at display ranges less than or
equal to 10 nm. Hard surfaced small airports are shown at display
ranges less than or equal to 20 nm. Hard surfaced large airports
are shown at display ranges less than or equal to 200 nm.
Information Button (i)
The Information button is shown on the screen, located on the right
side of the screen, after a map element is selected. The button is
gray in color and labeled with an “i” icon. Tap the button to show the
Weather Map Text screen on the left side of the screen.

TFR Map Elements

Temporary Flight Restrictions are displayed on the map as a solid red
line. A TFR is shown as a solid orange line up to 12 hours prior to the
effective date and time of the TFR.
AIRMET and SIGMET Map Elements
AIRMET and SIGMET are weather advisories with concise descriptions
of weather conditions in an area. The AIRMET are used for less
severe weather then the SIGMET. The type and graphic description
are detailed below:

Pilot’s Guide 2-45

Operation - Panel Mount Lynx ® NGT-9000

Table 2-5: Airport Symbols

DESCRIPTION SYMBOL
Towered Soft Surfaced Airport

Non-towered Soft Surfaced Airports

Towered Hard Surfaced Small Airports

(1,500 to 8,069 ft runway)
Non-towered Hard Surfaced Small Airports
(1,500 to 8,069 ft runway)
Towered Hard Surfaced Large Airports
(> 8,069 ft runway and some multi-surfaced < 8,069 ft
runways)
Non-towered Hard Surfaced Large Airports
(> 8,069 ft runway and some multi-surfaced < 8,069 ft
runways)

AIRMET TYPE DISPLAY PROPERTIES

Icing Straight hashed blue line

Turbulence Straight hashed orange line
Mountain Obscuring Straight hashed magenta line
IFR Straight hashed purple line
Unknown Straight hashed blue line

SIGMET TYPE DISPLAY PROPERTIES

Icing
Turbulence
Convective Straight hashed Red line

Volcanic Ash
Other

2-46 Pilot’s Guide

Lynx ® NGT-9000 Operation - Panel Mount
METAR Map Elements
METAR is a report of weather conditions at airports represented
graphically and consists of the FAA Flight Rules and Weather
Conditions. The flight rules icons shows the FAA flight rules for each
airport based on the visibility and cloud cover conditions. The weather
conditions icons indicates the weather conditions at each airport
based on precipitation, winds, and visual obstructions. The type and
graphic description are detailed below:

FLIGHT RULES DISPLAY PROPERTIES

VFR Filled cyan circle
MVFR Filled green circle
IFR Filled yellow circle
LIFR Filled magenta circle
Unknown Filled grey circle

REGIONAL NEXRAD Map Elements

NEXRAD provides data on precipitation and its intensity in the form
of a composite mosaic image. See Figure 2-17. NEXRAD information
extends to approximately a 75 nm radius of the ownship, and is only
updated every 5 minutes. Note - Freezing precipitation colors (pink/
blue) are not provided.
The age of the NEXRAD data is shown in the lower left corner of the
screen with yellow text. The time stamp is labeled with “RDR” and
“min”. Dashes replace the time stamp when no NEXRAD image data
is available. (The actual age of the data can be 0 to 20 minutes older
than indicated.)
CONUS NEXRAD Map Elements
CONUS information covers the Continental United States. It is only
updated every 15 minutes. See Panning paragraph on page 2-55 for
more information.

Figure 2-17: Example of NEXRAD Weather Map

Pilot’s Guide 2-47
Operation - Panel Mount Lynx ® NGT-9000
Traffic Button
This button is located on the far left side of the screen and is labeled
“TFC” with a left facing triangle. Tap the button to return to the Traffic
Application screen.

Zoom Buttons
Zoom In (+) and Zoom Out (-) buttons are located on the bottom of
screen. The buttons are used to change the display range shown on
the display. Display range options for the Graphic Application screen
are 10 (minimum), 20, 50, 100, 200, 400, and 800 (maximum).

Display Range Indicator

This indication is a readout of the selected display range and is located
in the lower right corner of the display.

Panning
Press and hold an area of the screen that is not a button for 1 second
to activate the Panning function. Drag across the map to move the
map in that direction. Tap the Cancel Pan button to inactivate the
panning function.

North Indicator
This indication is a white/green arrow located in the lower right corner
of the display. The indicator points to the top of the display when
the application is oriented north up and points true north when the
application is oriented track up.

Airport ID Indicator
The airport ID is shown on the screen, located below the Information
button, after an airport map element is selected.
Orientation Button
This toggle button is located on the left side of the screen is labeled
“Map”. The button has two selections “NRTH” which is north up and
“TRK” which is track up. The lower half of the button shows the current
map orientation in green text.
The north up orientation has the ownship position in the center of the
map screen.
The track up orientation has the ownship centered horizontally but
moved down to the lower one third of the screen (this orientation
provides a longer look ahead in the direction of travel).
The map defaults to North Up orientation if ownship position data is
not valid.
2-48 Pilot’s Guide
Lynx ® NGT-9000 Operation - Panel Mount
Map Options Button
The gear shaped Options Button is located in the upper right corner of
the map screen. Tapping the button opens the Options screen that has
three latch buttons located on the bottom of the screen. These buttons
are labeled ON/OFF, Declutter, and Done.
Tap the Done button to close the Options Screen.

On/Off Option Screen

The ON/OFF screen has Toggle On/Off buttons for the FIS-B products
and a Legend. A green LED indicates that the button and function is
On. See Figure 2-18.

Figure 2-18: On/Off Options Screen

Weather Map Legend Screen

The Legend screen is located on the left screen and is shown after
the Legend button in the On/Off screen is tapped. The screen has a
banner on the top of the screen above the left display area. See Figure
2-19.

Banner
The Banner is shown on the top of the screen having a gray background.
The banner provides the following information:
• Done button used to return to the previous screen.
• Mode A squawk code indicator.
• Reply “R” or Ident “ID” indicator shown to the right of the squawk
code when either function is active.
• Current transponder operating mode status indicator with green
text. An amber “Fail” is shown when the transponder function has
failed.

Pilot’s Guide 2-49

Operation - Panel Mount Lynx ® NGT-9000

Figure 2-19: Weather Map Legend Screen

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Lynx ® NGT-9000 Operation - Panel Mount
Display Area
The left display area is used to show the meaning of map elements
provided by FIS-B products. It is identified with the label “Legend”.
A scroll bar on the right side provides an indication that additional
information can be seen by using an up/down drag action.

Declutter Option Screen

The declutter screen has a banner at the top of the screen that is
labeled with the declutter range scale from 10 to 800.

The Declutter setting sets the zoom range when a product is displayed/
removed from the display.

The display area shows the declutter list of the different products
(NEXRAD, METAR, TFR, AIRMET, and SIGMET). LED indicators
show declutter ranges for each product. The selected list item is
highlighted in white. Use the Zoom buttons to increase and decrease
the layer range. Use a slide action to scroll up and down the product list.
The example in Figure 2-20 would indicate that NEXRAD information
would be displayed up to the 400 nm range.

Figure 2-20: Declutter Option Screen

Weather Map Text Screen

The Weather Map Text is shown on the left screen after the Information
button is tapped. The screen is removed from view when another
application is activated on the right screen or if the selected map
element is deselected. See Figure 2-21.

Display Area
The left display area is used to show text report data from the selected
map element.

Pilot’s Guide 2-51

Operation - Panel Mount Lynx ® NGT-9000

Figure 2-21: Weather Map Text Screen

Banner
The Banner is shown on the top of the left screen having a gray
background The banner provides the following information:
• Done button used to remove the Weather Map Text screen and
return the left side application screen.
• Mode A squawk code.
• Reply “R” or Ident “ID” indicator shown to the right of the squawk
code when either function is active.
• Current transponder operating mode status indicator with green
text. An amber “Fail” is shown when the transponder function has
failed.
• Product Select button opens a Product Select window. The button
is displayed only when the selected display element is an airport.
See Figure 2-22.
If selected product text data report is not available, the display area
indicates this by displaying the selected product with a “not available”
message.

Product Select List Window

The window shows a list of product types to select. Tapping the item
will select the product type. Only one product type can be selected at
a time. The available product are METAR, TAF, and NOTAM. Use a
slide action to scroll the window up and down. Tap the item in the list
to select. A selected item is indicated by a green indicator.
Tap the Done button to close the window and return to the Weather
Map Text screen. The selected product will now be displayed on the
Weather Map Text screen. If data for that product type is not available,
the message “not available” is displayed.

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Lynx ® NGT-9000 Operation - Panel Mount

Figure 2-22: Product Pick List Window

FIS-B Graphic Winds & Temp Application

The Graphical Winds and Temperature Application is available on the
right screen and is located in the third screen position (4th screen
position when TAWS installed, Release 2.0 or later) as indicated by
the Application Indicator. This application screen displays graphical
wind and temperature aloft information obtained from FIS-B products.
The aloft map orientation is shown as north up. See Figure 2-23.

Traffic Button
This button is located on the far left side of the screen and is labeled
“TFC” with a left facing triangle. Tap the button to return to the Traffic
Application screen.

Aloft Button
This button is located on the left side of the screen and is labeled
“Aloft” with white text and the active selection labeled either “Wind”
or “Temp” with green text. Tap the button to select the other screen
function.
Traffic Button Ownship Symbol Cancel Pan Button

Aloft
Button
Flight Level
Selection

North
Indicator

Zoom Time Display Range Zoom

Out Stamp Indicator In
Figure 2-23: Aloft Map Screen

Pilot’s Guide 2-53

Operation - Panel Mount Lynx ® NGT-9000

The winds aloft display properties are defined in Figure 2-24.

Figure 2-24: Winds Aloft Map Elements

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Lynx ® NGT-9000 Operation - Panel Mount
Panning
Press and hold an area of the screen that is not a button for 1-3
seconds second to activate the Panning function. Drag across the
map to move the map in that direction. Tap the “Cancel Pan” button to
deactivate the panning function.
NEXRAD images may not appear after panning and zooming to a
range 200 NM or less. Regional NEXRAD images displayed in panning
mode (when display range is 200 NM or less) are based on the data
received from nearby ground stations. Ground stations only provide
Regional NEXRAD data for areas 150 to 250 NM around their location.
Therefore, the Regional NEXRAD display image area is limited to an
area around your aircraft position. No data available (gray overlay) is
displayed when panning outside the available Regional NEXRAD data
range. Zooming out to a range of 400nmi or later will switch to the
CONUS NEXRAD display images (if available) and the depicted map
includes areas of the continental US (CONUS).
Both Regional and CONUS NEXRAD are affected with the declutter
“NEXRAD” setting. It is recommended that this declutter setting be
set to 800NM.
Assuming both Regional and CONUS NEXRAD is available:
Zoom Range = 200NM or less: Regional NEXRAD data only is
displayed.
Zoom Range = 400NM or later: CONUS NEXRAD data only is
displayed.
Zoom Buttons
Zoom In (+) and Zoom Out (-) buttons are located on the bottom of
screen. The buttons are used to change the display range shown on
the display. Display range options are 10, 20, 50, 100, 200, 400, and
800.
Issue Valid Time Indication
This indicator is located at the bottom of the screen and is shown with
green text when a valid time is shown. The text is shown with yellow
text when the data is not valid or available.
Ownship Symbol
The ownship is shown as a white triangle when heading or track is
valid. When ownship direction source is not valid the ownship symbol
is a white circle with a black inset.

Pilot’s Guide 2-55

Operation - Panel Mount Lynx ® NGT-9000
North Indicator
This indication is a white/green arrow located in the lower right corner
of the display. The indicator points to the top of the display when the
application is oriented north up.

Flight Level Selection

This is a vertical array of altitudes which is shown when the altitude is
pressed. Selection is done by tapping the screen on the value desired.
The values are in hundreds of feet.
When transitioning from one region to the other and the currently
selected flight level is not supported in the new region, the selected
flight level is reset to one that is supported.
FIS-B Textual Application
The Textual Application is available on the right screen and is located
in the fourth screen position as indicated by the Application Indicator.
This application screen displays textual weather information products
for selected airports provided by FIS-B. The products available are
METAR, TAF, NOTAM. See Figure 2-25.

Display Area
The display area is used to show text report data from the selected
Product.

Banner
The banner is located above the display area. The banner contains
buttons to return to the Traffic Application screen, open the Edit Airport
ID window, open the Favorites Pick List window, and a button to open
the Product Pick List window.
Traffic Airport Favorites Product
Button Button Button Button
Banner

Text Report
Data
Location: ABC1 Display Area

Day of month: 28
Time: 19:15 UTC
Wind: 360 @ 6 kts
Gusting to 0 kts
Visibility: 1 mile

Figure 2-25: FIS-B Textual Application

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Lynx ® NGT-9000 Operation - Panel Mount
Traffic Button
This button is located on the far left side of the banner and is labeled
“TFC” with a left facing triangle. Tap the button to return to the Traffic
Application screen.

Airport Button
This button is located to the right of the Traffic button and is labeled
with the Selected Airport identifier. This information is also shown
below in the display area. Tap the button to open the Edit Airport ID
window.

Edit Airport ID Window

This window is used to enter an Airport ID that is shown on the airport
button and the display. See Figure 2-26.
• Use the keyboard to enter the three or four character alpha-
numeric Airport ID in the airport edit box
• Tap the Cancel button to close the window without changing the
current Airport ID.
• Tap the Add to Favorites button (star plus icon) to add the current
Airport ID to the Favorites Pick List. The Favorites Pick List has
maximum of 50 entries. The button is inhibited when the pick list
has reached its maximum.
• Tap the Done button to close the window and set the selected
airport ID.
If a selected airport is not found in the navigation database, an “Airport
not found” message is shown in the display area.

Figure 2-26 Example of Edit Airport ID Window

Pilot’s Guide 2-57

Operation - Panel Mount Lynx ® NGT-9000
Favorites Button
This button is labeled with a amber star icon. Tap the button to open
the Favorites Pick List window.

Favorites Pick List Window

This window is used to select a pre-saved Airport ID. See Figure 2-27.

• The Favorite Airports list is centered in the display area showing

the list of airports set by the user via the add to favorite button
located in Edit Airport ID window. The list has a maximum 50
entries organized alphabetically. Use a slide action to scroll the
list. Tap an ID from the list to select it.
• Tap the Done button to return to close the window and set the
selected airport ID.
• Tap the Delete button to remove the selected airport ID from the
favorites list.
• Tap the Cancel button to close the window without changing the
current Airport ID.

Figure 2-27: Example of Favorites Window

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Lynx ® NGT-9000 Operation - Panel Mount
Product Button
This button is labeled with the current selected product. Tap the button
to open the Product Pick List window.

Product Pick List Window

This window is used to select an available FIS-B Textual Product,
which are METAR, NOTAM , and TAF. See Figure 2-28.

• The Product List is centered in the display area showing the list of
available Products. Tap the product from the list to select it.
• Tap the Done button to return to close the window and set the
Product.
If selected product text data report is not available, the display area
indicates this by displaying the selected product with a “not available”
message.

Figure 2-28 Example of Product Pick List Window

Pilot’s Guide 2-59

Operation - Panel Mount Lynx ® NGT-9000
TAWS OPERATION
The Terrain Awareness and Warning System (TAWS) is an optional
function that is set up during installation. The TAWS function
continuously monitors the aircraft’s position, altitude, speed, track, and
phase of flight and compares the information to the terrain database
loaded during installation. Terrain and obstacle hazards are indicated
by cautions and warnings using screen annunciators, aural terrain
alerts, and discrete alert lamps. See Figure 2-29 and the descriptions
below for details.
The details for the TAWS Screen at the beginning of this section is for
the Panel Mount version of the Lynx NGT-9000. The instructions for
TAWS Audio Alerts (page 2-68) and Conditions to Trigger Alerts or
Callouts (page 2-69 to page 2-77) are for both the Panel and Remote
Mount versions of the Lynx NGT-9000.

Figure 2-29: TAWS Screen

TerrainVision TM
Option
The TerrainVisionTM option is available with Panel Mount units
with Release 2.1 or later and is an optional function set up during
installation. This option sets the unit to show terrain only with no alerts.
When this option is installed the TAWS screen will have the indication
“TERR Advisory” at the bottom of the screen with all audio and display
alerting disabled. See Figure 2-30.

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Lynx ® NGT-9000 Operation - Panel Mount

Figure 2-30: Terrain Display Only - No Alerts Screen

Limitations
• The TAWS function shall not be used as a navigation instrument. It
is not intended to provide navigational guidance nor to relieve pilots
from following published navigational procedures, routes, altitude
restrictions, and/or instructions from air traffic control agencies
except in response to alerts to avoid potentially hazardous terrain
and/or obstacles. The terrain screen is intended to serve as a
situational awareness tool only.
• Terrain elevation recorded in the database refers to the actual
ground or water; it does not include trees, shrubs, or ice.
• TAWS does not operate in north of 70° N or south of 70° S.
• TAWS will use all airport runways included in the database. Contact
Jeppesen® if a runway is not included in the database.
• Some Aircraft may be equipped with an external CAWS or TAWS
type system that has higher priority audio annunciation that will
delay traffic or terrain alerts.

Defining Terrain Alerts

A caution alert as an alert that requires immediate pilot awareness
and corrective action usually necessary involving stop descending
or initiate either a climb or a turn, or both as necessary, based on
analysis of all available instruments and information.
A warning alert as an alert that requires immediate pilot action to initiate
and continue a climb that will provide maximum terrain clearance, or
any similar approved vertical terrain escape maneuver, until all alerts
cease. Vertical maneuvers are only recommended, unless either
operating in visual meteorological conditions (VMC), or the pilot
determines, based on all available information, that turning in addition
to the vertical escape maneuver is the safest course of action, or both.

Pilot’s Guide 2-61

Operation - Panel Mount Lynx ® NGT-9000
Traffic Button
This button is located on the far left side of the screen and is labeled
“TFC” with a left facing triangle. Tap the button to return to the Traffic
Application screen.

Zoom Buttons
Zoom In (+) and Zoom Out (-) buttons are located on the bottom of
screen. The buttons are used to change the display range shown on
the display. Display range options for the Graphic Application screen
are 2 (minimum), 6, 12, and 24 (maximum) nmi.

Display Range Indicator

This indication is a readout of the selected display range and is located
in the lower right corner of the display.

Display Orientation Indicator

The display orientation indicator is located on the lower left side of the
screen and is shown as either, No indication (default installed direction
source of heading or track), a white/green chevron indicating North-
Up orientation, or has the letters “TRK” indicating the installed heading
source has failed and the GPS track is now being used.
The display orientation indicator is not shown during normal operation.
Installations with heading will have a default display orientation of
heading up. Installations without heading will have a default display
orientation of track up.
When installations without heading are on the ground with no valid
track information, the screen reverts to north up depiction and indicates
the north chevron.
When installations with heading source have a heading failure, if track
is valid, the screen will revert to track up and indicate “TRK”. If track is
invalid (sitting on ground), then the screen will be north up.

Aural Acknowledge Button

This button is shown on the right side of the screen and appears as a
speaker icon when a terrain caution or warning alert occurs. Tap the
button to silence the aural part of the current terrain alert. The button
is then removed from the screen until another alert occurs.

Note - Some aircraft may be equipped with a yoke or panel mounted

acknowledge button that performs the same function.

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Lynx ® NGT-9000 Operation - Panel Mount
AGL Altitude Readout
The Above Ground Level Altitude readout is located in the top right of
the screen. The readout has a upper limit of 9,950ft. The readout is
removed from the screen if the altitude is > 10,000ft or when sitting on
the ground (0 ft AGL).

Ownship Symbol
The ownship symbol is a white triangle when the display orientation is
direction-up (true heading or true track-up are valid) and is centered
horizontally, but moved down to the lower one third of the screen. An
ownship velocity vector line uses ownship track and ground speed to
indicate 30 seconds of ownship travel.
The ownship symbol is a black/white circle when the display orientation
is north-up and is located in the center on the screen.

Obstacle Symbols
Obstacles are depicted as triangular shape objects that can be either
small or tall; colored as either cyan, yellow, or red; and shown as a
single object or as a group. Obstacles are shown when the display
range is 2, 6, and 12 nmi.
A small obstacle is shown for obstacles that are 200ft to <1,000ft tall.
Tall obstacles are shown for obstacles that are > 1,000ft. Obstacles
that are < 200ft are not shown on the TAWS screen.
Obstacle color is based on obstacle elevation (MSL altitude at the
top of the obstacle) compared to the aircraft altitude. Cyan colored
obstacles are > 1,000ft below the aircraft. Amber colored obstacles are
between 1ft and 1,000ft below the aircraft, and red colored obstacles
are equal to or above the aircraft altitude.

NOTE
While obstacles are enabled, TAWS is capable of
generating alerts on all obstacles included in the database.
However, due to incomplete obstacle data and display de-
cluttering techniques such as altitude filtering and obstacle
coalescing, every obstacle may not be depicted on the
Terrain Display.

Pilot’s Guide 2-63

Operation - Panel Mount Lynx ® NGT-9000
Airport Symbols
The symbol for the different types of airports are described in Table
2-5. Airport symbols are shown on the screen when the display range
is 12 nmi or less.
Airport Symbol Operation
Tap the symbol to display the Airport Identifier and the Information
button on the right side of the screen.
Tap the Information Button to open the TAWS Airport Text screen.
It’s operation is identical to the “Weather Map Text Screen”. Refer to
Figure 2-22 on page 2-53.
Tap an area of the screen without an airport symbol to deselect. The
airport symbol is also deselected when the distance between the
airport symbol and ownship is > 35 nmi.

Table 2-5: Airport Symbols

DESCRIPTION SYMBOL
Towered Soft Surfaced Airport

Non-towered Soft Surfaced Airports

Towered Hard Surfaced Small Airports

(<8,069 ft runway)
Non-towered Hard Surfaced Small Airports
(<8,069 ft runway)
Towered Hard Surfaced Large Airports
(> 8,069 ft runway)
Non-towered Hard Surfaced Large Airports
(> 8,069 ft runway

Estimated Quiet Zone Around Airport Symbols

on the TAWS display the 1.2 nmi radius gray-shaded area depicted
around each airport symbol is the estimated quiet zone. It is used as
a visual reminder that TAWS does not generate predictive alerts in the
area near airport runways.

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Lynx ® NGT-9000 Operation - Panel Mount
The TAWS system has a predictive terrain alert “or quiet zone” around
each airport runway to help reduce nuisance alerts during a normal
takeoff or landing procedures. GPWS-type alerts such as ‘excessive
descent rate’, however, are still active and will alert in this area.

Note that the predictive alert suppression is related to the location of

the alert, not the position of the aircraft. Aircraft within a quiet zone
may still predict alerts on terrain or obstacles outside the quiet zone.
See the ‘forward looking terrain avoidance (FLTA)’ section for more
information on quiet zones.

TAWS Terrain Color Legend

Each color represents a terrain elevation in relation the aircraft’s current
altitude. Table 2-6 shows color samples at 500 ft steps. The system
provides a smooth color transition to changing terrain elevations and
aircraft altitudes.

Table 2-6 Terrain Color Scheme

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Operation - Panel Mount Lynx ® NGT-9000
Information Button (i)
The Information button is shown on the screen, located on the right
side of the screen, after a airport symbol is selected. The button is
gray in color and labeled with an “i” icon. Tap the button to show the
TAWS Airport screen on the left side of the screen.
TAWS Airport Text Screen
The TAWS Airport Text screen is used to show text report data from
the selected airport symbol the same as the FIS-B Textual Products
Page. See Figure 2-31.

The screen is removed from view when another application is activated

on the right screen or if the selected airport symbol is deselected.

Figure 2-31: TAWS Airport Text Screen

The top portion of the screen is a gray banner that provides the
following information and operation:

• Tap the Done button remove the TAWS Airport Text screen and
return the left side application screen.
• Display of the Mode A squawk code.
• Reply “R” or Ident “ID” indicator shown to the right of the squawk
code when either function is active.
• Display of the current transponder operating mode status indicator
with green text. An amber “Fail” is shown when the transponder
function has failed.
• Product Select button opens a Product Select window. Refer to
Figure 2-22. The available product are METAR, TAF, and NOTAM.
If the selected product text data report is not available, the display
area indicates this by displaying the selected product with a “not
available” message.
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Lynx ® NGT-9000 Operation - Panel Mount
TAWS Options Button
The gear shaped Options Button is located in the upper right corner
of the right application screen. Tap the button to open the options
screen. Refer to Figure 2-32.

Figure 2-32: TAWS Options Screen

TAWS Options Screen

The Settings latch button opens a screen providing the setting of
Obstacles and Alerting status. Both buttons may be set to “Enabled”
or “Inhibited”. Both buttons are set to “Enabled at start-up.
• Selecting “Inhibited” on the Obstacles button removes obstacles
from the TAWS display and TAWS will not include obstacles as
part of the alert detection. This is used to stop TAWS alerting when
landing at an unknown airport or runway.
• Selecting “Inhibited” on the Alerting button places an “Inhibited”
indicator on the screen and removes visual TAWS alerts and stops
aural alerts from occurring.
Tap the Done button to close the Options Screen.

TAWS Display Alerts

When a TAWS Caution or Warning Alert is detected, the appropriate
alert symbol is depicted at the location of the alert on the terrain map.
Red or Amber Alert Text indicators which relate to the active TAWS
Alert are shown at the bottom center of the screen. Refer to Figure
2-31 and Table 2-7. The display alert is accompanied by an aural
announcement.

The TAWS Inhibited indicator is shown when Alerting is inhibited using

the TAWS options Screen.

Pilot’s Guide 2-67

Operation - Panel Mount Lynx ® NGT-9000

Table 2-7: TAWS Display Alerts

TAWS Warning Symbol

TAWS Caution Symbol

TAWS Warning Text

TAWS Caution Text

TAWS Caution Obstacle Text

TAWS Inhibited

TAWS Audio Alerts

Aural announcements for caution alerts are repeated every 7 seconds

and require immediate flight crew awareness and possible action. The
exact phrase used in the aural announcement depends on the instal-
lation setup, the type of alert condition, and whether the alert is due to
terrain or an obstacle. See Table 2-8.

Aural announcements for warning alerts are repeated continuously

and require immediate flight crew action. The exact phrase used in
the aural announcement depends on the installation setup, the type of
alert condition, and whether the alert is due to terrain or an obstacle.
See Table 2-8.
500 ft Altitude Callout
The 500 ft altitude callout consists of the aural announcement, “five
hundred.” The callout is intended to provide situational awareness
to the flight crew and does not necessarily indicate a hazardous
condition.

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Lynx ® NGT-9000 Controls and Indicators
Table 2-8: Caution & Warning Alert Phrases*
CAUTION Warning
ALERT ALERT Alert
CONDITION PHRASES Phrases
Reduced “Caution, Terrain; “Terrain, Terrain;
Caution, Terrain!” Pull Up, Pull Up!”
Required Terrain Clearance (RTC) Or Or
(Figure 2-35) “Caution, Obstacle; “Obstacle, Obstacle;
or Caution, Obstacle!” Pull Up, Pull Up!”
Imminent Terrain Impact (ITI) “Terrain Ahead,
Figure 2-36) “Terrain Ahead; Pull Up;
Terrain Ahead!” Terrain Ahead,
Or Pull Up!”
“Obstacle Ahead; Or
Obstacle Ahead!” “Obstacle, Obstacle;
Pull Up, Pull Up!”
Premature
Descent “Too Low, Terrain!” None
(Figure 2-37)
Excessive
Descent Rate “Sink Rate!” None
(Figure 2-38)
Negative “Don’t sink!”
Climb Rate or
None
Altitude Loss After Takeoff “Too low, terrain!”
(Figure 2-39)

* The primary or secondary phrase options are setup at installation.

Conditions to Trigger Alerts or Callouts

The TAWS function uses Forward Looking Terrain Avoidance (FLTA)
and Ground Proximity Warning System (GPWS) functionality to
determine when a terrain alert or altitude callout is triggered due
based on the following conditions:
• Reduced required terrain clearance (FLTA)
• Imminent terrain impact (FLTA)
• Premature descent
• Excessive descent rate (GPWS)
• Negative climb rate or altitude loss after takeoff (GPWS)
• Altitude of 500 ft (GPWS)

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Controls and Indicators Lynx ® NGT-9000

Forward Looking Terrain Avoidance (FLTA)

The conditions, reduced required terrain clearance and imminent
terrain impact, are part of the TAWS FLTA function. Using FLTA, TAWS
looks ahead of the airplane (in the database) along its projected vertical
and horizontal flight path, including turns, to determine if any terrain
or obstacles might pose a threat (Figure 2-33). (Hereafter, the word
“terrain” refers to “terrain or obstacles” unless indicated otherwise.)
The TAWS function determines the terrain threat based on the phase
of flight (Figure 2-34) and on the predicted terrain clearance compared
to the required terrain clearance (Tables 2-9 & 2-10). FLTA alerts are
disabled within the quiet zone when landing the aircraft to prevent
nuisance terrain alerts. The quiet zone is an area 1.2 nm around the
runway and 700 ft above the runway threshold.

Width of the search volume increases

linearly from 0.25 nmi at the plane, to
0.5 nmi 60 seconds ahead of the plane,
and increases even more around turns.
Note that turns are only "predicted"
based on the current turn rate.

istance
head D
Look-A Seconds)
(60

Terrain
istance
own D
Look-D ired Terrain
(Requ rance)
Clea Terrain

Figure 2-33: Forward Looking Terrain Avoidance (FLTA)

Figure 2-34: Phase of Flight Definitions

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Lynx ® NGT-9000 Operation - Panel Mount
Reduced Required Terrain Clearance (RTC)
The reduced RTC alert condition (Figure 2-35) occurs when the
aircraft is currently above the altitude of the upcoming terrain along
the projected flight path, but the projected terrain clearance is less
than the required terrain clearance (Table 2-9).

The TAWS function issues a caution alert 60 seconds before the

offending terrain and a warning alert 30 seconds before the offending
terrain.

“Terrain, terrain; pull up, pull up!”*

“Caution, terrain; caution, terrain!”*

TERRAIN PULL UP

Caution Warning Projected Terrain Clearance

Required Terrain Alert Alert
Clearance 30 sec
60 sec

Figure 2-35: Reduced RTC Alert Condition

Table 2-9: Required Terrain Clearances for the

Reduced RTC Alert Condition

Pilot’s Guide 2-71

Operation - Panel Mount Lynx ® NGT-9000
Imminent Terrain Impact (ITI)
The ITI alert condition (Figure 2-36) occurs when your aircraft is
currently below the altitude of the upcoming terrain along the projected
flight path, and the projected terrain clearance is less than the required
terrain clearance (Table 2-10).

The TAWS function issues a caution alert 60 seconds before the

offending terrain and a warning alert 30 seconds before the offending
terrain.

“Terrain, terrain; pull up, pull up!”*

“Caution, terrain; caution, terrain!”*

TERRAIN PULL UP
rrain
Projected Te
Caution Warning Clearance
Alert
rrain Alert
Required Te 30 sec
Clearance
60 sec

Figure 2-36: ITI Alert Condition

Table 2-10: Required Terrain Clearances for the ITI Alert Condition

Phase of Flight Required Terrain Clearance

Enroute 700 ft

Terminal 350 ft

Approach 150 ft

Departure 100 ft

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Lynx ® NGT-9000 Operation - Panel Mount
Premature Descent
The premature descent alert condition (Figure 2-37) occurs when
your aircraft is significantly below the normal final approach flight path
to the nearest runway (typically a 3-degree implied glideslope). This
condition may exist for a variety of reasons such as poor visibility
or nighttime operation. If this condition is not corrected, then likely
the aircraft will touch down short of the runway even if the aircraft is
properly configured for landing and is descending at a normal rate. The
premature descent alert is only enabled in the terminal and approach
phases.

The TAWS function uses the aircraft’s current position, flight path
information, and the runway database to detect the premature descent
condition and then a caution alert is sent.

TAWS function calculates premature descent alerts

based on the aircrafts proximity to the closest runway
WARNING and measures the aircrafts distance from that runway
once per second. The closest runway may or may not be
the runway intended for a landing.

700 ft

Nor
mal
Fina
l Ap
350 ft proa
Pre ch
mat Nearest
Caution Alert: ure Runway
Des
“Too low, terrain!” cen
t 150 ft
TERRAIN

1
2 nm

15 nm 12 nm 5 nm 2 nm 1 nm

Figure 2-37: Premature Descent Alert Condition

Pilot’s Guide 2-73

Operation - Panel Mount Lynx ® NGT-9000
Ground Proximity Warning System (GPWS) Alerting
The alert and callout conditions for excessive descent rate, negative
climb rate or altitude loss after takeoff, and altitude of 500 ft are
determined by the TAWS function subtracting the terrain elevation
stored in its terrain database from the GPS-based aircraft altitude to
calculate height above terrain.

Excessive Descent Rate

The excessive descent rate alert condition (Figure 2-38), also known
as GPWS Mode 1, occurs when the aircraft is descending too fast for
the aircrafts current height above terrain, regardless of the aircrafts
flap position. More precisely, it’s when your aircraft’s descent rate and
height above terrain fall within the envelopes shown in Figure 2-39.

The aircrafts descent rate determines the

height at which alerts begin to occur.

Caution Alert:“Sink Rate!” TERRAIN

Warning Alert:
“Pull up!”
PULL UP

Figure 2-38: Excessive Descent Rate Alert Condition

5,000

IN
Height Above Terrain (ft)

R RA
4,000 t: T E
Aler !”
on te
uti Ra
Ca ink
3,000 “S

2,000
Warning Alert:
“Pull up!”
1,000 PULL UP

0
0 2,000 4,000 6,000 8,000 10,000
Descent Rate (fpm)
Figure 2-39: Excessive Descent Rate Graph
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Lynx ® NGT-9000 Operation - Panel Mount
Negative Climb Rate or Altitude Loss After Takeoff
These alert conditions (Figure 2-40), also known as GPWS Modes
3A and 3B are enabled between 50 and 700 ft above the runway
after takeoff or after a missed approach. The negative climb rate alert
condition is based on descent rate. The altitude loss after takeoff
alert condition is based on accumulated altitude loss in order to catch
descents that are too gradual to qualify for the negative climb rate alert
condition. The two together ensure that practically any descent after
takeoff or missed approach will trigger an alert.

“Don’t sink!”
or 700 ft
“Too low, terrain!”
Caution Alert
TERRAIN

50 ft
Runway

Figure 2-40: Negative Climb Rate or

Altitude Loss After Takeoff Alert Condition

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Operation - Panel Mount Lynx ® NGT-9000
When the aircraft’s height above the runway elevation and its descent
rate or altitude loss fall within the envelopes shown in figures 2-40 and
2-41, TAWS issues a caution alert.

700
Height Above Runway (ft)

600
500 Caution Alert:
“Don’t sink!”
400 or
300 “Too low, terrain!”
TERRAIN
200
100
0
0 1,000 2,000 3,000 4,000 5,000 6,000 7,000
Descent Rate (fpm)
Figure 2-41 Negative Climb Rate Graph

700
Height Above Runway (ft)

600
500
Caution Alert:
400 “Don’t sink!”
300
or
“Too low, terrain!”
200 TERRAIN

100
0
0 20 40 60 80 100 120
Altitude Loss (ft)
Figure 2-42: Altitude Loss After Takeoff Graph

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Lynx ® NGT-9000 Operation - Panel Mount
Altitude of 500 ft
This condition (Figure 2-43), also known as a subset of GPWS Mode
6, occurs when the aircraft descends within 500 ft of the terrain
during enroute mode, or when the aircraft is in enroute mode in level
flight but the terrain below rises up within 500 ft of the aircraft. It also
occurs when the aircraft descends within 500 ft of the nearest runway
threshold elevation during terminal or approach mode. When any of
these conditions occurs, TAWS issues an aural 500 ft altitude callout
(“five hundred”). The 500 ft altitude callout does not occur when the
aircraft is ascending or during departure or missed approach mode.
The callout is ready to play again only after the aircraft ascends to 700
ft above the terrain or runway.

“Five Hundred”

500 ft

“Five Hundred”

500 ft

Figure 2-43: Altitude of 500 Feet Callout Condition

Pilot’s Guide 2-77

Operation - Panel Mount Lynx ® NGT-9000
LIGHTNING OPERATION
Lightning detection is an optional function that is set up during
installation. The Lightning function continuously monitors electrical
discharges from thunderstorms within a 200 nmi radius of the aircraft
and plots the location of the discharges as cells or strikes on the right
application screen. See Figures 2-43 and 2-44 and the descriptions
below for details.

Refer to the Stormscope (WX-500) Users Guide 009-11501-001 for

in-depth details.

Figure 2-44: Lightning Screen 360 View

Never use the Lightning system to attempt to penetrate

a thunderstorm. The FAA Advisory Circular, Subject:
WARNING Thunderstorms, and the Airman’s Information Manual
(AIM) recommend that aircraft are to “avoid by at least 20
miles any thunderstorm identified as severe or giving an
intense radar echo.”

Traffic Button
This button is located on the far left side of the screen and is labeled
“TFC” with a left facing triangle. Tap the button to return to the Traffic
Application screen.

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Lynx ® NGT-9000 Operation - Panel Mount

Figure 2-45: Lightning Screen 120 View

Ownship Symbol
The ownship symbol is a white triangle with the nose of the ownship
symbol corresponding to the ownship position.
• When the View mode is 360 the symbol is centered on the screen.
See Figure 2-44.
• When the View mode is 120 the symbol is centered at the bottom
of the screen. See Figure 2-45.

Zoom Buttons
Zoom In (+) and Zoom Out (-) buttons are located on the bottom of
screen. The buttons are used to change the display range shown on
the screen. Display range options for the Lightning screen is 25, 50,
100, and 200 nmi.
360 View
Display range 25 NM has a white outer circle with Azimuth indicators
at 30 degree intervals. See Figure 2-44.
Display range 50, 100, and 200 has Azimuth indicators at 30 degree
intervals in an outer ring. An inner white circle surrounds the Ownship
that represents 25 nmi from the Ownship.
120 View
Display range 25 NM has a white outer arc with Azimuth indicators at
+ / - 30 degree with white radial lines extending from the nose of the
ownship symbol. See Figure 2-45.
Display range 50, 100, and 200 has Azimuth indicators at +/- 30 and
+/- 60 degrees with white radial lines extending from the nose of the
ownship symbol. An inner white arc extends from the +/- 60 radial
lines that represents 25 nmi from the Ownship.

Pilot’s Guide 2-79

Operation - Panel Mount Lynx ® NGT-9000
Mode Button
This toggle button is located on the left side of the screen and is labeled
“MOD”. The button has two selections “STK (strike) and “CEL” (cell).
The lower half of the button shows the current mode selection in green
text. Refer to Table 2-11 for Lightning Symbology.
• Set the mode for Strike to display strike data on the screen. Strike
data is most useful during periods of light electrical activity as this
will show the strengthening thunderstorm sooner then cell data.
• Set the mode for Cell to display cell data on the screen. Cell data
is used during heavy electrical activity.
Note - Other atmospheric phenomena can cause isolated discharge
points in the Strike Mode screen. Clusters of two or more discharge
points do indicate thunderstorm activity when they reappear after
clearing the screen.
In the Cell Mode screen even a single discharge point may represent
thunderstorm activity and should be avoided.

Table 2-11: Lightning Symbols

STRIKE CELL STRIKE AGE

0-10 sec

10 sec - 1 min

1-2 min

2-3 min

Clear Button
This button is located on the far right side of the screen and is labeled
“CLR”. Tap the button to clear the screen of the current lightning data
(strike or cell).

Clearing the lightning data periodically helps in determining if a storm

is strengthening or dissipating. A strengthening storm is indicated by
the lightning data reappearing faster and in larger numbers, while a
dissipating storm appears slower and with fewer number of strikes.

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Lynx ® NGT-9000 Operation - Panel Mount
Lightning Options Button
The gear shaped Options Button is located in the upper right corner
of the right application screen. Tap the button to open the Lighting
Setting page. Refer to Figure 2-46.
Lightning Settings (View Mode, Stabilization, Status)
The Settings page is active when “Settings” label is green. The page
shows the WX-500 software information, WX-500 Status information,
current display View and Stab (stabilization) status.
• The View Mode toggle button can be set for either 120 or 360
degrees.
• The Stab Mode toggle button can be set for either On or Off.
When set to “On” the position of the electrical discharge points
on the display are automatically adjusted as the aircraft changes
heading. Stab should always be “On” except for system without a
heading source or if heading is invalid.
It is recommended that Stabilization be set to “Off” if heading is
invalid and remain off until heading input is corrected. When set
to Off the heading indicator is not displayed and a “STAB OFF”
message is shown on the screen.
• Along with the software information the status of the WX-500
is indicated as “OK”in white text, “Degraded” in amber text, or
“Failed” in red text. If degraded or failed is shown a fault code
and description is shown. Multiple codes will rotate one at a
time for 3 second periods. A list of error messages and fault
information is provided in the WX-500 User’s Guide (009-11501-
001).
Press the Done button to return to the lightning application screen.
Note - The Tests page is used for installation of the WX-500 and
should be ignored.

Figure 2-46: Lightning Setting Page

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Operation - Panel Mount Lynx ® NGT-9000
Heading Stabilization
The heading stabilization automatically adjusts the position of the
discharge points on the screen when the aircraft changes heading.

• This feature is not available for aircraft with out a heading input or
if heading data is invalid.
• If heading data is invalid as indicated by amber dashes shown for
the heading indicator, then stabilization should be set for Off using
the Lighting Options page.
• If heading stabilization is Off tap the “CLR” button to clear the
discharge points after each heading change to display new
discharge points in the proper location relative to the nose of the
aircraft.
Strike Rate Indicator
The Strike Rate Indicator is located in the upper right corner of the
screen and is labeled “RATE”. The indicator shows the approximate
number of strikes per minute providing the user a way to determine if
thunderstorms are strengthening or weakening.
Strike Rate Trend Arrow
This white arrow is shown to the left of the Rate Indicator. When the
arrow is shown pointing up it indicates an increase in strikes while a
down pointing arrow indicates a decrease in strikes.

Heading Indicator
The heading indicator is located on the top right side of the screen and
provides a three digit (001 to 360) display of heading.
If heading is invalid the digits are replaced with three amber dashes
and heading stabilization is off.
Note - Heading is optional and this indicator will not be shown if
heading is not used.

Application Indicator / Nearby Strike

The Application Indicator is located on the bottom of the screen. It
shows the current application screen (lightning) compared to the other
enabled application screens.
A Nearby Strike Indication (activity indicator) is shown over the
lightning application dot . It fades in/out when active to draw attention
to possible storm activity. See Figure 2-45.

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Lynx ® NGT-9000 Operation - Panel Mount
MAINTENANCE MODE
Maintenance mode is used to perform a screen calibration. See Figure
2-47.
1. Apply power to the Lynx NGT-9000.
2. When the splash screen is shown press and hold (continue
holding when the status and version screens are showing) in the
lower left corner of the display until the Activate Maintenance
Mode window is shown on the right screen.
3. Tap the Yes button to restart the unit in Maintenance Mode. Note
- Pressing the No screen button or 10 seconds of inactivity starts
normal operation mode.
4. Tap the Screen Calibration text.
5. In the Calibration screen touch and release each target shown.
(Four calibration targets and two verification targets). Each must
be completed within 15 seconds or the Calibration Time out
message is shown. The unit returns to the main screen.
6. If normal operation is desired cycle power to the unit or tap the
Reboot text on the main screen followed by tapping the Main App
> text to perform a warm startup.
7. When in normal operation check that the touch screen accuracy
has improved. If the accuracy has not improved, try the calibration
procedure again. If the issue continues contact ACSS Field
Service for help in resolving the issue prior to removing the unit
for repair.

Pilot’s Guide 2-83

Operation - Panel Mount Lynx ® NGT-9000

Activate
Maintenance Mode?

No Yes

Maintenance
Screen Calibration >

Reboot >

Touch and Release Target

Reboot
< Back Main App >
Maint No-WiFi >
Maint With-WiFi >
Ground Test >

Figure 2-47: Maintenance Screens

2-84 Pilot’s Guide

Lynx ® NGT-9000

CHAPTER 3
OPERATION - REMOTE MOUNT
INTRODUCTION
Operational control of the Remote Mount Lynx NGT-9000R is
accomplished with a CP-2500 Control Panel or a compatible control
panel. This chapter describes the operation of the CP-2500 interfaced
to the Lynx NGT-9000R. Details on the optional cockpit switches and
indicator lamps are provided in chapter 4.

POWER ON
1. There is no power on/off switch for the Remote Mount Lynx NGT-
9000R. Depending on the aircraft, use either the battery switch or
avionics master switch to apply power. Normal operation begins
within 20 seconds of applying power. During start up the unit
checks for valid configuration data and initializes self tests.
2. If not already accomplished, press the small knob button to apply
power to the CP-2500 Control Panel.
3. The Lynx NGT-9000 GPS begins acquiring position.
a. After power is applied to the CP-2500 and the self test passes,
the CP-2500 briefly displays “OK” (or a status message is
seen). Followed by the scrolling of the firmware and hardware
levels of the CP-2500 (approximately 15 seconds). The CP-
2500 then reverts to normal operation. The message “GPS-
INIT” will be shown for approximately until a GPS position is
acquired.
• If an ADS-B System Fail is displayed after approximately 2
minutes, then the GPS position was not acquired. Verify that
the aircraft (and GPS antenna) have a clear view of the sky.
If the problem continues.
b. If installed the ADS-B Out Fail lamp is Off for 2 minutes and
then flashes (1 second On/Off) indefinitely until a GPS position
is acquired. Normally, GPS acquisition occurs within the first
minute and therefore no lamp flashing occurs.

Pilot’s Guide 3-1

Operation - Remote Mount Lynx ® NGT-9000
4. If using the WiFi function, activate the PED and flight application.
Check that traffic and weather are operating properly. Based
on available ADS-B service, weather data and traffic may not
be seen. Note - NEXRAD updates are only transmitted every 5
minutes, and CONUS information every 15 minutes.
5. If the optional traffic and weather displays are ON (and
functioning), check display status. Based on available ADS-B
service, weather data and traffic may not be seen. Note - Some
traffic displays may show “DATA-FAIL” until the GPS signal is
acquired.

CP-2500 CONTROL PANEL

The display of the CP-2500 shows the operational mode on the left
side of the display and the squawk code on the right side of the display
as shown in Figure 3-1.

The CP-2500 has the following standard functions: set operation

mode, set squawk code, and view current pressure altitude. The
following optional functions are part of the configuration options set
during installation of the Lynx NGT-9000R: set a flight ID mode, Traffic
functions, and TAWS functions.

In addition pressing the I button activates the IDENT, pressing the V

button changes the squawk code to a preset VFR code, and pressing
the M button provides access to the following functions: Info, set the
VFR Code, maintenance, TAWS inhibit (TAWS configured), TAWS
obstacle inhibit (TAWS configured), TAS or TCAS mode (TAS or TCAS
configured and on ground only). Details are provided below.

Notes
1. Refer to CP-2500 Pilot’s Guide (0040-17250-01) for
additional operational information.
2. The optional Flight ID function is available on the CP-
2500 if the Flight ID is configured via the DCM settings
during installation of the Lynx NGT-9000R.

3-2 Pilot’s Guide

Lynx ® NGT-9000 Operation - Remote Mount
Operational Squawk
Mode Code

Display
Large Knob
A LT 1 2 0 0

I V M Small Knob
Button
Push
Buttons Small Knob

Figure 3-1: Example of CP-2500

Power Off
To remove power to the CP-2500, press and hold the small knob
button until the message “Power Down” is shown on the display.
(Note - This does not remove power to the Lynx NGT-9000R.)

Enter the Squawk Code

1. Rotate the large knob to select the squawk page.
2. Press the small knob. Observe that the left most digit blinks.
3. Rotate the small knob to change the number, rotate the large
knob to select the next digit. Repeat until all digits are changed.
4. Press the small knob or allow the screen to time out to commit
the change.

NOTE
The four digit squawk code may be missing from the “Alt”
and “On” screen of the CP-2500 (code appears OK in “Sby”
mode) if the NGT-9000R has a system message, a system
failure, or if the GPS signal is missing for greater than 2
minutes.

Set Operational Mode

Rotate the small knob to set the operation mode to Altitude (Alt), On,
or Standby (Sby). The Altitude mode is always selected unless Air
Traffic Control (ATC) requests a change or if there is a known problem
with the control panel or NGT-9000.

Pilot’s Guide 3-3

Operation - Remote Mount Lynx ® NGT-9000
View Pressure Altitude
1. Rotate the large knob until the “Altitude” is shown.
2. Rotate the large knob to return to normal operation or screen will
time out within 10 seconds.

NOTE
INVLD PA is shown if no pressure altitude source is
available from the aircraft. In some installations, it may take
2-3 minutes after power on to receive valid pressure altitude
from the encoder.

Set Flight ID
The flight ID function is optional and is part of the configuration options
set during installation of the NGT-9000.
1. Rotate the large knob to select ID.
2. Press the small knob to select the first digit.
3. Rotate the small knob to change the digit (CCW) or character
(CW).
4. Rotate the large knob to move the cursor to the next digit.
5. Press the small knob to commit.
Deactivate the Flight ID
1. Rotate the large knob CW to move the cursor off the right side of
the display.
2. Continue rotating unit only dashes fill the display.
3. Press the small knob to commit.

IDENT Activation
The use of this button is directed by Air Traffic Control (ATC).
1. Press the I (IDT) button. See Figure 2-7
2. The IDENT message is sent by the ADS-B unit for 18 sec.
3. Observe that IDENT is momentarily (or for 18 sec. for Release
2.1 or later) displayed.

VFR Code Select

Press the V (VFR) button to set the squawk code to a programmed
VFR code that preset in the menu (see VFR code below).
• Typically the VFR code is set to 1200 (in the United States).
• Press the button again returns the code to the previous squawk
code.
3-4 Pilot’s Guide
Lynx ® NGT-9000 Operation - Remote Mount
Set VFR Code
The VFR code can be changed from the default (always set to 1200
in the United States).
1. Press the M (Menu) button.
2. Rotate the large knob to scroll the menu to VFR
3. Press the small knob to select the first digit.
4. Rotate the small knob to set the number.
5. Rotate the large knob to move the cursor to the next digit (4 total).
6. Press the small knob when done.
View Info
Available on ground only.
1. Press the M (Menu) button.
2. Rotate the large knob to scroll the menu to Info
3. Press the small knob button to select.
4. The Info menu option shows the following information about the
unit:
• Status (OK or FAIL)
• Hardware (HW Rev) configuration
• Firmware (FW Rev) configuration
5. Rotate the large knob to scroll through the information.
6. Scroll to “Done” and press the small knob to exit.
7. Press the M button to exit back to normal operation.

Traffic Advisory Aural Acknowledge and Reply

This function is a configuration option.
1. When a Traffic advisory is heard press the small knob button
to acknowledge the audio alert and silence the current audio
message.
2. Press the small knob button again to replay the traffic advisory if
still available.

NOTES
The “TRAFFIC” message must be displayed when the button
is pressed to acknowledge or replay the aural.
Some aircraft may be equipped with a yoke or panel
mounted acknowledge button that will silence the current
audio message only.

Pilot’s Guide 3-5

Operation - Remote Mount Lynx ® NGT-9000
Enable On Ground TAS/TCAS Operation
This function is a configuration option. In the air TAS/TCAS is always
active. The TAS/TCAS On Ground Setting is available only when the
aircraft status is “On Ground”. After takeoff it is canceled and must be
reactivated.
1. Press the M (Menu) button.
2. Rotate the large knob to scroll the menu to “TRAF”.
3. Press the small knob button to select.
4. Rotate the small knob to set the TAS/TCAS mode to “Standby” or
“Operating”.
5. Press the small knob when done.
• The message “TAS OPR” or “TCAS OPR” shown when TAS/
TCAS is operating while on ground.

TAWS Alert Aural Acknowledge

This function is a configuration option.
When a TAWS alert is heard and the messages “PULL UP” or
“TERRAIN” are shown on the CP-2500 display or indicator lamps (if
installed). Press the small knob button to acknowledge the audio alert
and silence the current audio message.
Note - Some aircraft may be equipped with a yoke or panel mounted
acknowledge button that performs the same function.
Inhibit TAWS Alert Message
This function is a configuration option. The TAWS option default
setting is “Enable”.
1. Press the M (Menu) button.
2. Rotate the large knob to scroll the menu to TAWS
3. Press the small knob button to select.
4. Rotate the small knob to set the TAWS mode to Enabled or
Inhibited
5. Press the small knob when done.
• Inhibiting TAWS stops TAWS visual alerts from being displayed
on the CP-2500 and stops TAWS aural alerts from occurring.
• The message “TAWS INH” is shown on the display while the
TAWS option is inhibited.
Valid alert conditions that put the aircraft
WARNING in danger may be missed if all terrain
alerts are in inhibited.

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Lynx ® NGT-9000 Operation - Remote Mount
Inhibit TAWS Obstacles
The TAWS Obstacle option default setting is “Enabled”.
1. Press the M (Menu) button.
2. Rotate the large knob to scroll the menu to Obstacle
3. Press the small knob button to select.
4. Rotate the small knob to set the TAWS Obstacle mode to Enabled
or Inhibited
5. Press the small knob when done.
• Inhibiting TAWS Obstacles results in TAWS not including
obstacles as part of the alert detection.
• The message “OBST INH” is shown on the display while the
obstacle option is inhibited.

Activate Maintenance Self Test

The maintenance item is available only when the aircraft is on ground.
The procedures and the results are slightly different depending on
model, version, and releases. Each of the procedures are described
below.
The Self Test for the NGT-9000R has evolved with the Releases. The
self test have been separated into the following paragraphs.

NGT-9000R (Release 1.2)

1. Press the M (Menu) button.
2. Rotate the large knob to scroll the menu to Maintenance.
3. Press small knob to view status “Self Test” “Disable”.
4. Turn the small knob to change status to “Enable”.
5. Press the small knob again to activate self test.
6. When activated, the screen momentarily displays “Test Started”
7. The results of the test are that during the test three targets are
shown on the optional Traffic or PED display and the ADS-B Out
Fail lamp (if installed) flashes during the test.
• The results shown on the display can be test passed “Tst
Pass” or test failed “Tst Fail”.
8. Press the M button to exit or scroll the large knob to “Done” and
then press small knob to exit and return to normal operation.

Pilot’s Guide 3-7

Operation - Remote Mount Lynx ® NGT-9000
NGT-9000R (Release 2.0 & 2.1)
1. Press the M (Menu) button.
2. Rotate the large knob to scroll the menu to Maintenance.
3. Press small knob to enter “Self Tst”.
4. Press the small knob again to activate self test.
5. When activated, the screen momentarily displays “Test Started”
followed by “Test In Progress”.
• If the optional traffic or PED display is installed, each will show
three targets during the test.
• If the optional ADS-B Out Fail is installed it will be ON for 10
seconds during the test.
6. The results shown on the display (and over audio) can be test
passed “Tst Pass”, test failed “Tst Fail”, or test degraded “Test
Degraded”.
• If a failure is detected a fail message is flashed on the CP-2500
screen for 5 seconds. The possible fail messages are:
• NO LRU RESPONSE
• XPDR FAIL
• ADS-B OUT FAIL
• ADS-B IN FAIL
• FIS-B FAIL
• GPS FAIL
• TAS FAIL
• TAWS FAIL
• If a degraded condition is detected a degraded message is
flashed on the CP-2500 screen for 5 seconds. The possible
degraded messages are:
• ADS-B OUT DEGRADED
• TAS DEGRADED
• GPS INIT
• CONFIG MODULE - SERVICE SOON

3-8 Pilot’s Guide

Lynx ® NGT-9000 Operation - Remote Mount
NGT-9000R (Release 3.0 & 3.1)
1. Press the M (Menu) button.
2. Rotate the large knob to scroll the menu to Maintenance.
3. Press small knob to enter “Self Tst”.
4. Press the small knob again to activate self test.
5. When activated, the screen momentarily displays “Test Started”
followed by “Test In Progress”.
• If the optional traffic or PED display is installed, each will show
three targets during the test.
• If the optional ADS-B Out Fail is installed it will be ON for 10
seconds during the test.
6. The results shown on the display (and over audio) can be test
passed “Tst Pass”, test failed “Tst Fail”, or test degraded “Test
Degraded”.
• If a failure is detected a fail message is flashed on the CP-2500
screen for 5 seconds. The possible fail messages are:
• NO LRU RESPONSE
• XPDR FAIL
• ADS-B OUT FAIL
• ADS-B IN FAIL
• FIS-B FAIL
• GPS FAIL
• TAS FAIL
• TCAS Fail
• TAWS FAIL
• If a degraded condition is detected a degraded message is
flashed on the CP-2500 screen for 5 seconds. The possible
degraded messages are:
• ADS-B OUT DEGRADED
• TAS DEGRADED
• TCAS DEGRADED
• GPS INIT
• CONFIG MODULE - SERVICE SOON

Pilot’s Guide 3-9

Operation - Remote Mount Lynx ® NGT-9000
Display Messages
Messages are either received from the NGT-9000R or being
annunciated from the CP-2500. Messages have priority over normal
display operation and are seen scrolling across the display. Entering
the menu mode will stop the messaging until the menu mode is exited.
Rotating the large knob scrolls through the prioritized messages and
the normal display operation (showing operational mode and squawk
code). The display begins showing the highest priority message
again after 10 seconds of no activity. The priority of the messages is
discussed in the CP-2500 product manuals.
The messages have evolved with the model and software releases.
The following messages are listed from highest to lowest priority.

NGT-9000R Release 1.2

• NO LRU RESPONSE: The CP-2500 has detected loss of
communication with the NGT-9000R. This is a CP-2500 message
that was incorporated in Firmware 15 and later.
• TAS FAIL: The TAS function has failed.
• XPNDR FAIL: The transponder function of the NGT-9000R has
failed.
• ADS-B OUT FAIL: The ADS-B out is not being transmitted by the
NGT-9000R due to the GPS position not being available for more
than 2 minutes or possibly a failure of the NGT-9000R.
• GPS FAIL: The GPS derived position input is not functioning.
• IDENT: The IDENT message is being sent by the NGT-9000R to
Air Traffic Control (ATC).(CP-2500 message.)
• GPS INIT: GPS Initialization –The GPS contained within the NGT-
9000R is not ready. This message is removed after the GPS
completes initialization.
• NO ADS-B COVERAGE: This message is removed once the NGT-
900R begins receiving an ADS-B ground station signal.
• GND MODE: Unit is in ground test mode.

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Lynx ® NGT-9000 Controls and Indicators
Display Messages (continued)
NGT-9000R Release 2.0 & 2.1
• NO LRU RESPONSE: The CP-2500 has detected loss of
communication with the NGT-9000R. This is a CP-2500 message
that was incorporated in Firmware 15 and later.
• GPS FAIL (Priority On Ground): The GPS derived position input is
not functioning.
• GPS INIT (Priority On Ground): GPS Initialization –The GPS
contained within the NGT-9000R is not ready. This message is
removed after the GPS completes initialization.
• PULL UP: This is a TAWS Warning Alert that is accompanied by an
aural announcement.
• TERRAIN: This is a TAWS Caution Alert that is accompanied by an
aural announcement.
• TRAFFIC: This is an TAS or ATAS Traffic Advisory that is
accompanied by an aural announcement.
• GND MODE: Unit is in ground test mode.
• STANDBY: The STANDBY message is seen only when the
transponder is in Standby Mode. (Release 2.1 or later, CP-2500
Firmware 15 or later.)
• IDENT: The IDENT message is being sent by the NGT-9000R to
Air Traffic Control (ATC).(Release 2.1 or later, CP-2500 Firmware
15 or later) (CP-2500 message.)
• TAWS FAIL: The TAWS function has failed.
• TAWS UNAVAILABLE: The TAWS function is unavailable due to
not having a GPS position solution of sufficient quality.
• TAS FAIL: The TAS function has failed.
• ADS-B IN FAIL: The ADS-B In and ATAS functions have failed.
• ADS-B IN UNAVAIL - POS: The ADS-B In and ATAS functions are
unavailable due to not having a GPS position solution of sufficient
quality.
• XPDR FAIL: The transponder function has failed.

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Controls and Indicators Lynx ® NGT-9000
Display Messages (continued)
NGT-9000R Release 2.0 & 2.1 continued
• ADS-B OUT FAIL: The ADS-B out is not being transmitted by the
NGT-9000R due to the GPS position not being available for more
then 2 minutes or possibly a failure of the NGT-9000R.
• TAWS INH: The TAWS function is currently inhibited.
• OBST INH: The TAWS function is not alerting on obstacles.
• TAS DEGRADED: The TAS function is operating in a degraded
condition.
• ADS-B OUT DEGRADED: The ADS-B out function is operating in
a degraded condition.
• GPS FAIL (Priority In Air): The GPS derived position input is not
functioning.
• GPS INIT (Priority In Air): GPS Initialization –The GPS contained
within the NGT-9000R is not ready. This message is removed after
the GPS completes initialization.
• NO ADS-B COVERAGE: This message is removed once the NGT-
900R begins receiving an ADS-B ground station signal.
• FIS-B FAIL: The FIS-B function has failed.
• TAS OPR: TAS is operating while the aircraft is on ground.
• CONFIG MODULE - SERVICE SOON: Indicates a problem being
detected with the configuration module.

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Lynx ® NGT-9000 Controls and Indicators
Display Messages (continued)

NGT-9000R Release 3.0 & 3.1

• NO LRU RESPONSE: The CP-2500 has detected loss of
communication with the NGT-9000R. This is a CP-2500 message
that was incorporated in Firmware 15 and later.
• GPS FAIL (Priority On Ground): The GPS derived position input is
not functioning.
• GPS INIT (Priority On Ground): GPS Initialization –The GPS
contained within the NGT-9000R is not ready. This message is
removed after the GPS completes initialization.
• PULL UP: This is a TAWS Warning Alert that is accompanied by an
aural announcement.
• TERRAIN: This is a TAWS Caution Alert that is accompanied by an
aural announcement.
• TRAFFIC: This is an TAS/TCAS or ATAS Traffic Advisory that is
accompanied by an aural announcement.
• GND MODE: Unit is in ground test mode.
• STANDBY: The STANDBY message is seen only when the
transponder is in Standby Mode. (CP-2500 Firmware 15 or later.)
• IDENT: The IDENT message is being sent by the NGT-9000R to
Air Traffic Control (ATC). (CP-2500 Firmware 15 or later) (CP-2500
message.)
• TAWS FAIL: The TAWS function has failed.
• TAWS UNAVAILABLE: The TAWS function is unavailable due to
not having a GPS position solution of sufficient quality.
• TAS FAIL: The TAS function has failed.
• TCAS FAIL: The TCAS function has failed.
• ADS-B IN FAIL: The ADS-B In and ATAS functions have failed.
• ADS-B IN UNAVAIL - POS: This message is removed when both
sufficient track/heading information is received. If no heading
source is installed, the track angle is not considered valid unless a
speed of 7 knots is present and a GPS position solution of sufficient
quality begins to be received.
• XPDR FAIL: The transponder function has failed.

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Controls and Indicators Lynx ® NGT-9000
Display Messages (continued)

NGT-9000R Release 3.0 & 3.1 Continued

• ADS-B OUT FAIL: The ADS-B out is not being transmitted by the
NGT-9000R due to the GPS position not being available for more
than 2 minutes or possibly a failure of the NGT-9000R.
• TAWS INH: The TAWS function is currently inhibited.
• OBST INH: The TAWS function is not alerting on obstacles.
• TAS DEGRADED: The TAS function is operating in a degraded
condition.
• TCAS DEGRADED: The TCAS function is operating in a degraded
condition.
• ADS-B OUT DEGRADED: The ADS-B out function is operating in
a degraded condition.
• GPS FAIL (Priority In Air): The GPS derived position input is not
functioning.
• GPS INIT (Priority In Air): GPS Initialization –The GPS contained
within the NGT-9000R is not ready. This message is removed after
the GPS completes initialization.
• NO ADS-B COVERAGE: This message is removed once the NGT-
900R begins receiving an ADS-B ground station signal.
• FIS-B FAIL: The FIS-B function has failed.
• TAS OPR: TAS is operating while the aircraft is on ground.
• TCAS OPR: TCAS is operating while the aircraft is on ground.
• CONFIG MODULE - SERVICE SOON: Indicates a problem being
detected with the configuration module.

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Lynx ® NGT-9000

CHAPTER 4
CONTROLS AND INDICATORS
INTRODUCTION
This chapter provides details on switches, indicators, and other
devices that could be interfaced to the panel and remote mounted
Lynx NGT-9000.
COCKPIT SWITCHES
Cockpit switches are optional and may not be a part of the aircraft
installation.
IDENT
This switch activates SPI and transmits an ident pulse. An ident pulse
highlights the aircraft’s symbol on the ATC’s radar screen and is
identified on the panel mount Lynx NGT-9000 screen when active.
Audio Acknowledge
Release 2.0 or later. This button cancels the current aural alert.

Standby Mode
Release 2.1 or later. This switch will place the NGT-9000
Transponder into Standby. The mode will be indicated on the display
and will cause the lower three buttons (Mode, Squawk, and IDENT)
to be removed. The squawk code can edit screen is still available by
tapping the squawk code text.

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Controls and Indicators Lynx ® NGT-9000
INDICATOR LAMPS
Indicator lamps are optional and may not be a part of the aircraft
installation. Lamps are generally needed when the display is not within
the pilot’s primary field of vision.

Traffic Advisory
The Traffic Alert lamp (amber) illuminates when:
• TAS, TCAS, or ATAS is enabled and there is a Traffic Advisory
condition (only possible when TAS is activated).
• TAS or TCAS is enabled and Self-test is active, the lamp will be
“ON” for approximately 8-10 seconds.
• Release 2.0 or later. ATAS is enabled and there is a traffic advisory
condition (ATAS uses ADS-B In traffic data).

TAWS Caution
The TAWS Caution lamp (amber) illuminates when:
• A terrain caution advisory is present.
• A Self-test is active, the lamp will be “ON” for approximately 8-10
seconds.

TAWS Warning
The TAWS Warning lamp (red) illuminates when:
• a terrain warning advisory is present.
• A Self-test is active, the lamp will be “ON” for approximately 8-10
seconds.

ADS-B Out Fail

The ADS-B Out Fail lamp primarily indicates when the Lynx NGT-9000
is not providing ADS-B output data. The lamp may be illuminated (ON)
for any of the following reasons:
1. When Lynx NGT-9000 is not powered, lamp defaults to “ON”.
2. When the aircraft is On-Ground and the self-test is run, the lamp
is “ON” for approximately. 8-10 seconds.
3. Aircraft On-Ground startup the lamp is “ON” initially until the Lynx
NGT-9000 has started and is operational after which the lamp will
extinguish.

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Lynx ® NGT-9000 Controls and Indicators
4. When the GPS has “failed”, the lamp is “ON”. GPS failures
happen when:
a. The Lynx NGT-9000 internal GPS indicates a failure.
b. Aircraft is On-Ground and the GPS has acquired position, but
the signal is lost for more than 2 minutes.
c. Aircraft is In-Air and the GPS has not acquired position within
2 minutes (either startup or had position and lost it).
5. The lamp begins to flash for the following reasons:
a. Aircraft On-Ground, there is a 2 minute “quiet period” when
the GPS is expected to acquire position. After 2 minutes, the
lamp will flash indefinitely while the GPS has never acquired,
but is not failed.
b. Aircraft In-Air, at startup or if GPS had position and then lost
it, then the lamp will flash for 2 minutes while trying to acquire
position, then become failed (see 4c above).

ALTERNATE DISPLAYS
An alternate display may be interfaced to the Lynx NGT-9000, but care
must be taken to insure that there is not a conflict of input commands.
Use the following guidelines when using an alternate display:

• Refer to the operations manual for the alternate display for

instructions.
• Check with a L3 APD dealer or with ACSS for a current list of
compatible alternate displays.
• Lynx NGT-9000 can provide Traffic (ADS-B, TAS, and TCAS) via
ARINC 429 and Traffic/FIS-B Weather via RS-422.
• Some alternate displays have the same display ranges as the Lynx
NGT-9000, while others generate their own display ranges.

Traffic Display
The look of traffic screens on alternate display may vary. Details
on alternate display symbology is shown below. Displays using
conventional ARINC 735 TIF traffic will only depict TA, Proximate and
other traffic. Displays using the new ARINC 735B DTIF traffic can
depict all the listed traffic symbols noted below.

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Controls and Indicators Lynx ® NGT-9000
Other Traffic Symbol
On alternate displays the Other Traffic (OT) symbol represents an
intruder aircraft that has been detected within the selected display
range and vertical display mode, but which has not generated a TA or
a PA. The symbol is white or cyan on color alternate displays.

On some alternate displays, OT symbols disappear when a TA occurs,

and reappear (if still in range) once the TA goes away. Some alternate
displays can also have options set to filter out all OT symbols.
Proximity Advisory Symbol
The Proximity Advisory (PA) represents an intruder aircraft that has
not generated a TA, but which is within a horizontal range of 4 nmi and
a relative altitude of ±1200 ft. The symbol is white or cyan on color
alternate displays.
Ownship Symbol
This symbol (cyan or white on color alternate displays) represents the
aircraft’s relative position and heading.
Off-Scale Traffic Advisory (TA)
This function is limited to Lynx NGT-9000 with TAS, TCAS, or ATAS
enabled. The Off-Scale Traffic Advisory symbol (amber on color
alternate displays) represents a TA that has been detected beyond
the current display range. The symbol is displayed at a position along
the outer range ring that indicates the relative bearing of the intruder
aircraft. On an alternate display, a text message such as “OS” or
“OFFSCALE” may be used to indicate the presence of an off-scale TA.

Indicators
The following data is output from the Lynx NGT-9000 and may be
shown on the alternate display:

• GPS Position
• Maintenance Required
• Ident message
• Message Counts
• Seconds Since 0000 UTC

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Lynx ® NGT-9000 Controls and Indicators
Weather Display

Compatible weather displays (Wx) can interface with the Lynx NGT-
9000 to provide Flight Information Service Broadcast (FIS-B) weather
information using the ADS-B In link. FIS-B service is available only
from a ground station that is in range. Screen information and controls
may be different for each of the compatible displays. Refer to the
displays operations manual for details on operation and a description
of how the weather is depicted.
WiFi Interface
The Lynx NGT-9000 provides the following report messages to the
Personal Electronic Device (PED) via RS-232:

• Ownship Report
• Traffic Report
• Weather Report
The PED requires applications that support the data. Examples of
supported Applications are ForeFlight, FTPL-GO, Sky Radar and
Wing X Pro. Check with the ACSS web site for latest updates.

Compatible Control Panel

A compatible control panel must be able to support the same functions

provided by the CP-2500. Refer to the control panel operations manual
for details on operation.

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Controls and Indicators Lynx ® NGT-9000

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Lynx ® NGT-9000

CHAPTER 5
TROUBLESHOOTING
INTRODUCTION
This chapter describes potential conditions that could occur while
using the Lynx NGT-9000 MultiLink Surveillance System.
Installations using a display for traffic or weather should also refer to
that products Pilot’s Guide for troubleshooting information.
It is recommended to crosscheck other cockpit displays/instruments
for errors and/or data inconsistency. Operation of indicator lamps is
provided in Chapter 3.
Conditions may correct themselves, but power cycle may be required.
If problems persist, contact an L3 APS authorized service center
or ACSS Field Service at (855) 532-7746 noting symptoms, error
messages, and flight conditions.

GENERAL DISPLAY CONDITIONS

The indications listed in the table below are shown on the display
during normal operation. This information is also included in the
operation section and is included here for convenience.

Table 5-1: General Display Conditions

for the Panel Mount Lynx NGT-9000
INDICATION DESCRIPTION
Pressure Altitude digits Invalid Pressure Altitude
replaced with amber
dashes.
ON-GND Transponder is operating in the on-
ground mode.
Traffic Failed Displayed if both ADS-B, TAS, or TCAS
(Amber text) have failed.

XPDR Failed Transponder data is invalid. This

(Amber text) indication is shown on the transponder
screen and alternate traffic screen.

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Troubleshooting Lynx ® NGT-9000

Table 5-1: General Display Conditions

for the Panel Mount Lynx NGT-9000
INDICATION DESCRIPTION
Traffic Unavailable • ADS-B is operational but heading
(Amber text) and track are invalid.
• GPS is failed.
• TAS is in Standby.
• TCAS is in Standby.
• Transponder Mode Control is “ON”
which inhibits the display of relative
altitude so traffic is unavailable.
TAS STBY A traffic mode indicator that is shown
(Models with TAS only) when the Traffic Awareness (TAS)
system is in standby.
TAS ONLY A traffic mode indicator that is shown
(Models with TAS only) when TAS is in operation, but ADS-B is
unavailable.
TCAS STBY A traffic mode indicator that is shown
(Models with TCAS only) when the Traffic Awareness (TCAS)
system is in standby.
Release 3.0 or later
TCAS ONLY A traffic mode indicator that is shown
(Models with TCAS only) when TCAS is in operation, but ADS-B
is unavailable.
Release 3.0 or later
ADS-B ONLY A traffic mode indicator that is shown
(Models with TAS only) when TAS is failed (or not available)
and ADS-B is available.

Initializing The indication is shown on the weather

map (FIS-B application screen).
It continues to be shown until internal
operations have completed.
Map Fail The indication is shown on the weather
map (FIS-B application screen).
It is shown when a fault is detected that
prevents the FIS-B data from showing
on the screen.

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Lynx ® NGT-9000 Troubleshooting

Table 5-1: General Display Conditions

for the Panel Mount Lynx NGT-9000
INDICATION DESCRIPTION
TRK (Track) Shown on the display only when the
system is configured for heading and
indicates that heading is failed or
unavailable.
TAWS Failed The indication is shown when the
(Amber text) TAWS function has failed due to a GPS
or database failure.
Release 2.0 or later

TAWS Unavailable The indication is shown when GPS

(White text) is not providing enough data for the
TAWS system to work or terrain data is
Release 2.0 or later
missing from the database.
TAWS Initializing The indication is shown during startup
(White text) while the GPS is initializing.
Release 2.0 or later
Terrain Display Failed The indication is shown due to a TAWS
(Amber text) software failure. The TAWS audio
Alerting feature is still functional.
Release 2.0 or later

Lightning Failed The indication is shown when the

(Amber text) Lightning function has failed due to the
a fault with the WX-500 Stormscope.
Release 2.1 or later

Lightning Initializing The indication is shown during startup

(White text) while the WX-500 Stormscope is
initializing.
Release 2.1 or later

Lighting Screen shows “--- Verify “STAB” is set to “ON” (see

” for heading. lightning setting page).

STANDBY This indication is shown on the

transponder screen when the external
Release 2.1 or later standby switch is activated or switched
to the alternate transponder.

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Troubleshooting Lynx ® NGT-9000
SYSTEM STATUS MESSAGES
This section applies to the panel mount Lynx NGT-9000. The system
status messages are seen on the screen either during start up or
when the System Test button is pressed. The typical meanings of the
messages are detailed in the bullets below.

• A “Fail” message is caused by something internal to the Lynx NGT-

9000.
• An “External Fail” message is caused by a problem with the external
equipment input signals. The unit continues to attempt to acquire
the signal without rebooting. These messages will automatically
clear once communications has been restored to the external
equipment.
• A “Degraded” message indicates a function has limited capability
due to an internal failure.
• An “External Degraded” message indicates a function has limited
capability due to an external failure.
• A “Coverage” or “No Signal” message indicates that no signal is
being received from a ground station.

Attempt to clear fail or degraded messages by cycling power to the

unit.
The Continue button is active whenever a failure or degraded window
message is shown. It may be used to begin normal operation with
degraded performance.

The Lynx NGT-9000 continues to operate even if a failure is detected

during the System Test by providing any functionality unaffected by the
failures. Secondary faults are displayed as “Service Unit Soon” as part
of the message. (These faults do not directly impact the operation and
function of the Lynx NGT-9000, but are recorded in the maintenance
log).

Tap the MSG button located on the Transponder Application screen to

view fail messages during normal operation. The MSG button blinks
when new messages have been received and have not yet been
viewed. When all the faults are cleared the MSG button is removed
from the screen.

5-4 Pilot’s Guide

 APPENDIX A
RECORD OF IMPORTANT INFORMATION

Dealer Information

Name ____________________________________________
Address __________________________________________
City, State, Zip _____________________________________
Telephone ____________________________________________

Equipment Information

Date of Purchase ___________________________________

Installation Date ____________________________________
Model Number _____________________________________
Part Number ______________________________________
Serial Number _____________________________________
Mod Letter ________________________________________
Software Release ___________________________________

Aircraft Information

Aircraft Make ______________________________________

Aircraft Model ______________________________________
Serial Number _____________________________________
N Number ________________________________________

Register this product online at:

http://www.l3aviationproducts.com/warranty-registration/

Pilot’s Guide A-1

Aviation Products 0040-17000-01
Revision L (March 15, 2018)