FLATPACK

The Flatpack cage protects AQDSU canister, SSH-01 hydrophone cylinder and cable takeout.
Material Flatpack cage aluminum-bronze
articulated bend restrictors glass-fiber-reinforced plastic
Maximum outside width 174 mm
Maximum outside height 71 mm
Cage length 455 mm
Number of bend restrictors 7 + 1 tapered end link on each side
Overall length with bend restrictors 968 mm
Stiff length 392 mm
Weight in air 14.15 kg
Weight in sea water 10.88 kg

ENVIRONMENT
Storage temperature – 40ºC to + 60ºC
Operating temperature 0°C to +40°C
Deployment/Testing Temperature* 15ºC to + 40ºC
(with degraded performance)
Maximum operating depth SeaRay® 100 100m
Maximum operating depth SeaRay® 300 300m
500m with specific handling care

AQAS/EXTENDERS
Extender cables are constructed of varying lengths of lightweight, flexible SeaRay® bulk cable, from 25 metres to 400 metres long. They have a
SeaRay® female cable connector (28-contact circular socket connector) housed in a waterproof cable termination at each end.
Optical extender cables are constructed of varying lengths of armored cable from 400 metres to 2,4 kilometers long. They have a SeaRay® female
cable connector (28-contact circular socket connector) housed in a waterproof cable termination at each end. The termination includes the
optical/electrical converters.
The AcQuisition Active Section (AQAS) is the data-gathering section with flatpacks spaced equidistantly along the cable. The quantity of flatpacks
on an AQAS must be even.
User-specified distances between flatpacks are between 12.5 metres and 55 metres. Standard AQAS configuration is 10 flatpacks per cable.
Typical lengths are 250 metres and 500 metres. For example, an AQAS with ten flatpacks 25 metres apart will have a length of 250 metres. An
AQAS with ten flatpacks 50 metres apart will have a length of 500 metres.
Minimum spacing of receiver points 12.5 m
Maximum spacing of receiver points up to 60 m

* Tests can be run before deployment on the seabed.

SeaRay® 100
Color yellow
Outside diameter 21.6 mm (over ribs)
Maximum active section length 1800 m
Minimum breaking strength 22 kN
Maximum allowable working load 4.5 kN
Point (local) pressure loading 10 Mpa
Minimum sheave diameter 1.5 m
Weight in air 564 kg/km
Weight in sea water 210 kg/km
Maximum operating depth 100m

SeaRay® 300
Color yellow
Outside diameter 28.5 mm (over ribs)
Maximum active section length 1800 m
Minimum breaking strength 66 kN
Maximum allowable working load 16.5 kN
Point (local) pressure loading 10 Mpa
Minimum sheave diameter 3.0 m
Weight in air 849 kg/km
Weight in sea water 231 kg/km
Maximum operating depth 300m
500m (with specific handling care)

OPTICAL EXTENDER
Construction Double armour
Outside diameter 23.0 mm
Maximum length 2,4 kms
Minimum breaking strength 300 kN
Maximum allowable working load 80 kN
Minimum sheave diameter 3m
Weight in air 1700 kg/km
Weight in sea water 1350 kg/km
Maximum operating depth 300m
500m (with specific handling care)
SENSORS
AQDSU

GENERAL
Sensor Component 3 omni tilt digital
accelerometer and 1
hydrophone
Sample rates** 4,2,1,0.5,0.25 ms
Word Size 24 bits
Offset 0 (digitally zeroed)
High cut filter** 0.8 FN (linear or minimum phase)
Stop band attenuation > 120 dB (above Nyquist)
Time Standard True synchronous system
Phase accuracy 20 μs
Power consumption Typical (during acquisition): 320mW
Max (during sensor tests): 370mW

DIGITAL ACCELEROMETER CHANNELS

Type Omni tilt DSU-428
Full scale 5m/s2
Tilt Max Value ± 180°
Bandwidth 0 – 400 Hz (up to 1600 Hz with degraded specifications)
Distortion -90 dB
Amplitude Calibration Accuracy ± 0.25%
Orthogonality Calibration Accuracy ± 0.25°
Noise (10-200Hz) 0.4 μm/s2/√Hz
System dynamic range 120 dB @ 4 ms
Tilt accuracy ± 0.5° @ 20°C

HYDROPHONE CHANNEL
Type FDU-428 Input with
charge amplifier
Full scale @ G1600: 1.6 V RMS
@ G400: 400 mV RMS
Noise (3-200Hz) (typical) @ G1600: 450 nV RMS
@ G400: 145 nV RMS
Bandwidth 3 – 1600 Hz
Instant dynamic range 124 dB
System dynamic range 136 dB
Distortion -110 dB
CMRR 110 dB
Gain Accuracy <0.1%
Phase Accuracy 20 μs

CANISTER
Material Nickel aluminium
Bronze
Outside diameter of canister 54 mm
Length: overall length of canister 203.2 mm
length over non-mated connectors 240.1 mm
length over mated connectors 300.4 mm
Weight in air 1.571 kg

** Bandwidth limited to 400Hz with full specification

SSH HYDROPHONE
All specifications apply at ambient pressure and 20ºC. All electrical and acoustic measurements are made with the two internal hydrophone
elements combined into an in-phase, parallel circuit. All sensitivity values are free-field voltage sensitivity (FFVS). All specifications without
tolerance limits denote typical values.

GENERAL
Material polyurethane sleeve
Fill fluid Silicone fluid
Outside diameter of cylinder 54 mm
Length 154 mm
Weight in air 0.405 kg
Operating temperature –15ºC to +50ºC
Storage temperature –40ºC to +60ºC

ELECTRICAL SPECIFICATION
Lead type 4-conductor cable with an Impulse 4pin 90-degree connector
Lead length 140 mm
Capacitance 9.6 nF ±15% at 1 V & 1 KHz (@ 20ºC & 1 ATM)
(Approx. 0.4% increase per degree C°).
9.6 nF stands for the equivalent capacitance of the two hydrophone elements in parallel connection. The
system’s sensor test reads the average of the capacitance values of the two elements, that is 4.8 nF.
Resistance, lead to lead or lead to case > 100 MΩ @ 10 VDC.
Dissipation factor 0.02 (typical maximum)

PERFORMANCE SPECIFICATION
Voltage sensitivity Hydrophone sensitivity:
–204.5 dB re 1 V/μPa (5.96 V/bar) ± 1.5 dB at 20 Hz (@ 20ºC & 1 ATM).
System sensitivity (including charge amplifier): 5.66 V/bar.
Voltage sensitivity vs. temperature <1.5 dB change from –10ºC to +40ºC (0.04 dB maximum change per 1ºC)
Maximum operating depth 500 m
COMPATIBILITY
Compatibility between SeaRay and SeaRay 428
Software Version <V2.0 >V2.0
Transmission rate 8 MHz 16 MHz 8 MHz 16 MHz
TZRU Yes No Yes No
TZLU Yes No Yes No
Yes Yes
SBLU No No
Repeater : 400 m Repeater : 300 m
Optical Extender Yes No Yes Yes

Software Version <V2.0 >V2.0

BCXU output Voltage 365V 600V 365V 600V
TZRU Yes No Yes Yes
TZLU Yes No Yes No
SBLU No No Yes Yes
Optical Extender Yes No Yes Yes

GPS Accutime Gold Meinberg M300

Software version < V2.0 > V2.0

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