Scribd
Upload
139 views5 pages

Module 1: Non Precision Approach

This document provides an overview of a non-precision instrument approach procedure, which is divided into 5 segments: arrival, initial, intermediate, final, and missed approach. It describes the purpose and components of each segment, including typical navigation aids used like VOR, NDB, DME. The initial approach fixes the aircraft on its path, the intermediate segment connects to the final descent, and the missed approach provides an escape route if landing is not possible.

Uploaded by

jei li
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
139 views5 pages

Module 1: Non Precision Approach

This document provides an overview of a non-precision instrument approach procedure, which is divided into 5 segments: arrival, initial, intermediate, final, and missed approach. It describes the purpose and components of each segment, including typical navigation aids used like VOR, NDB, DME. The initial approach fixes the aircraft on its path, the intermediate segment connects to the final descent, and the missed approach provides an escape route if landing is not possible.

Uploaded by

jei li
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 5

3/08/2017

MODULE 1
Non‐Precision Approach:
Introduction

Contents

• Introduction
• Arrival Segment
• Initial Approach Segment
• Intermediate Segment
• Final Approach Segment
• Missed Approach Segment

2 Non‐Precision Approach: Introduction

1
3/08/2017

NPA Introduction

A non‐precision approach is divided into 
Arrival, Initial, Intermediate, Final and Missed 
Approach segments.

3 Non‐Precision Approach: Introduction

NPA Introduction

• A non‐precision instrument approach procedure is a series of predetermined 
manoeuvres by reference to flight instruments and ground based navigation 
aids (excludes Instrument Landing System).

• Begins from an Initial Approach Fix (IAF)

• Ends at the Missed Approach Fix (MAPt) from which a landing can be made

• Includes specified protection from obstacles, and, if a landing is not made, 
direction to a position where holding or en‐route criteria apply.

4 Non‐Precision Approach: Introduction

2
3/08/2017

NPA Introduction

• The most commonly used ground based navigation aids for non‐precision 
instrument approaches are:

– Very High Frequency Omni‐directional Range (VOR), 

– Non Directional Beacons (NDB), 

– Distance Measuring Equipment (DME), 

– Tactical Air Navigation (TACAN), 

– Terminal Approach Radar (TAR) or Search Radar Element (SRE).

5 Non‐Precision Approach: Introduction

Arrival Segment
• Links en‐route structure to the approach procedure.
VOR/DME 2

Arrival Segment
Radial and distance 
provided by VOR/DME 2 Arrival Segment
DME Arc provided by DME 1

Approach Missed Approach

VOR/DME 1

Approach Procedure

6 Non‐Precision Approach: Introduction

3
3/08/2017

Initial Approach Segment
• First segment begins at an Initial Approach Fix (IAF).
• The initial approach segment can be a DME arc.

Initial Approach Fix (IAF)

Initial Segment

Approach Missed Approach

Intermediate Fix (IF)

7 Non‐Precision Approach: Introduction

Intermediate Segment
• Connects the Initial Approach with the Final Approach. 

Initial Approach Fix (IAF)

Initial Segment

Intermediate 
Segment
Missed Approach

Intermediate Fix (IF) Final Approach Fix (FAF)

8 Non‐Precision Approach: Introduction

4
3/08/2017

Final Approach Segment
• Final descent for landing from the Final Approach Fix (FAF).

Initial Approach Fix (IAF)

Initial Approach 
Segment

Intermediate Approach Final Approach Segment 
Segment (Straight in)
Missed Approach

Intermediate Fix (IF)
Final Approach Fix 
(FAF)

9 Non‐Precision Approach: Introduction

Missed Approach Segment
• Enables the aircraft to return for another attempt at the approach or divert via 
the en‐route structure.

Initial Approach Fix (IAF)

Initial Approach 
Segment

Intermediate Approach Final Approach Segment  Missed Approach


Segment (Straight in) (back to VOR)

Intermediate Fix (IF) Final Approach Fix (FAF)
Missed Approach Segment

10 Non‐Precision Approach: Introduction

You might also like