If you are going to fly a constant latitude away from the equator you are going to have to get your calculator out and constantly change your heading or shall we say direction if using a gyro.
If your fly a Longitude you just set your gyro pointing in North or South direction and just keep pointing the same way.
the whole thing falls over though because of magnetic North pole so in reality its not as easy as you might think apart from a very limited area both sides of the world so realistically you have to forget about a compass so that leaves a gyro which has drift etc etc.
So I would class the question as theoretical bollocks which has no real application to the real world. And pointless asking because its a easy remember job from a question bank so a such doesn;t renforce the concept which it is very poorly trying to test.