NOTE: The question mentions a deviation, which should not be the case, as a gyromagnetic compass (which is inside an RMI) is required to be less than 1°, so no deviation has to be applied. We previously assumed that deviation should not be applied, but it appears that some authorities are assuming it to be applied, so now we are applying it. We think that this is an error which could be appealed, but we have not heard of a successful appeal of this question yet.

In SWEDEN and Ireland, deviation is NOT applied.

In Austro Control, Spain, Poland, and the UK CAA deviation IS applied.

To work out the answer, we need to identify which of the needles is pointing at the NDB in question. In the bottom left of the instrument, the yellow needle is pointing at "ADF", and the green needle at "NAV", so the yellow needle is the one we wish to use.

The head of the yellow ADF needle is pointing directly at the NDB, so that is our QDM, the magnetic bearing towards the beacon. We find the reciprocal of that number (or look at the tail of the needle) to find the QDR, the magnetic bearing (well technically the compass bearing if we are applying deviation - see the note above) from the beacon to our aircraft.

We now need to adjust that for the deviation and variation using the following phrases:

• Deviation West, Compass Best
• Variation East, Magnetic Least

Or using the following table.