Page 881 - PPL-engelsk 2025

Navigation

By measuring the phase shift or phase difference between these signals, the

receiver in the aircraft finds out which radial the aircraft is on.

The image here shows a section
from the ICAO aeronautical chart

with Codan Vor at Møn.

As you can see, the radials are

oriented relative to magnetic

north. The north radial is

therefore radial 0, the south
radial is radial 180.

In the box below you will see the identifications for Codan Vor, including the

frequency 114.900 (MHz), which you set on the Nav radio. n (as you see below).

The dashes and dots at the bottom right are Morse code for the letters C, D and

A, and the first thing you do after setting the frequency is to listen to these Morse

codes and then make sure that it is the right radio beacon that you have set.

9.9.3.2 The aircraft part - Nav radio and indicator

The aircraft has a Nav radio, as well as an indicator instrument. The Nav radio

can be integrated with the aircraft's Com radio. However, there is an antenna for

each part.

Here you see such an integrated

radio part. The Nav part on the

right, the Com part on the left.

Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 881