BigEndBob,
Interesting point about non-aviation GPSs. I'm open to suggestions as they are considerably cheaper!
As I said in my earlier post I will be using it to cross-check and confirm my watch-map-ground position. If non-aviation GPSs (like the Garmin GPS 12/XL or GPS72) allow entry of airport waypoints, towns, VORs etc. then I see little reason to buy a moving map pilot GPSIII.
Can someone who uses a non-aviation GPS for flying run through how it is still useful as a navigation aid. I presume speed and distance are in mph and miles respectively or is knots an option?
Thanks.