Originally Posted by tev9999

I've used my Garmin Nuvi driving GPS on aircraft many times. You need to be sitting in a window, with the unit very close to the window, to pick up the satellite signals. It is tough to maintain a satellite lock since the aluminum plane blocks all satellites that you don't have line of sight to through your window. Just about any commercial GPS unit should be able to do this. Saving route information is not as common in "road" GPS units, but it is probably available in higher end units.