This is a chart showing:
The goal of the example is to go direct YQA NDB from the present
In order to properly fly to this NDB, please refer to the following page: Automatic Direction Finder
The first step for the pilot is to tune the instruments:
- Tune the NDB frequency on the ADF frequency selector
- Verify that the ADF instrument is updated (arrow was moving from standby position to the beacon)
After tuning to the NDB frequency, the arrow of the ADF is moving and points to the NDB.
Low frequency beacons can sometimes be received at great distances. It is very important to verify the Morse-code identifier of the station to be certain you are navigating from the proper beacon.
If order to turn to the beacon we shall turn the heading toward the ADF arrow and stop the turn when the arrow points to the top of the ADF (0°) like the figure below.
If we check the route flown by the aircraft after this manoeuvre on the map, you can see that the aircraft is going directly to the wanted NDB.
When approaching the NDB with your aircraft, since the ADF will always turn to the direction of the beacon, you can see in the cockpit the quick move of the arrow which points from top position to bottom position.
The figure below shows two intermediate positions and the last position after flying over the NDB.
If you maintain the heading, you continue your route outbound the NDB
If we check the cockpit view in that position, we find the ADF arrow pointing to the 6 o'clock position and pointing towards the NDB.