I googled it and apparantley the gps 72 and 76 from garmin are pretty off accuracy wise and like to crash because of something with WAAS and the only thing i can find is basically disable WAAS and garmin said they were workin on a fix for it from about 4 months ago or so but i cant find any updates or work arounds I have a 72 GPS anyone else know anything... I was using it for caching today and it was almost 50-100 yds sometimes off when it said it was an accuracy of 15 ft in 3d tracking,.