Hi leon, Well, as a ham I have read about moon bounce, but I have never done it, and do not know anyone who has done it, but I would think that people do it just to see if they can. As for using GPS in flight, well, I guess there is no real need to do it, but, again, it would be neat to know exactly where you are, especially on a long flight. I get bored on plane trips, and can't afford First Class, so sleeping is out of the question. (SMILE)! Andy