BEagle,
But the number of times I've found TRK and DTK left displayed - and met people who think that if DTK = TRK, then they must be on track.... Clearly they've never heard of parallel lines!
Thank you for saying that because it has helped to show a very important point;
Many of those that advocate traditional methods for Visual Navigation do not understand navigation at all and also (since none of the GPS users here have picked you up) the GPS users are no better when it comes to GPS navigation.
Please ask yourself if at 0900 the DTK is 090 and the TRK is 090, where the aircraft can only be in relation to the waypoint and if DTK and TRK are the same, what will change other than distance to the waypoint.
PS - Also ask the DA40 IR initial candidates that fly super accurate NDB procedures (nothing to do with the constant GPS track readout of course)
There is a study in large aircraft circles to see if it would be better to go from magnetic heading as a reference to (as one option) track and ATC would issue track instructions as opposed to heading instructions.
Regards,
DFC