When flying an NDB approach and you also have a hand held aviation GPS running do you fly the GPS track line or try and maintain the track with the ADF needle when the ADF is hunting back and forth due to whatever is causing the hunting of the needle?
I'd track the GPS track. Checking the ADF at the start of the inbound leg only.
Here is another quick one.
When flying towards an NDB that is several hundred miles in front of you would you use a hand held GPS to maintain an accurate track or only use the ADF needle?
I'd use the GPS track, but would expect the ADF to be reasonably accurate (you are talking about a very high power NDB there). I find the ADF very accurate over large areas of flat open country e.g. N France.