Question for owners of "real" aviation GPS's: Are these units capable of outputting a track file in .gpx (or other) format? I ask because I'm working on an app (windows) to load, display, and analyze such a file for flight testing purposes. Up until now I've been using GPLIGC which is a great program that does most of what I want, but it's not very user friendly (especially the install!) and has a lot of features I don't need that are primarily aimed at sailplane pilots. So far I've been mostly using tracks generated by an old Garmin 60Csx, a non aviation handheld that has a built in pressure sensor, so the altitude information is more accurate than a straight GPS.