Why every traveler who ventures off the beaten path doesn't carry a GPS receiver is beyond me. Free access to government satellites is unbeatable. The units are affordable, compact, all but bulletproof, and they're the absolute best insurance policy that you'll never get lost again. I took this unit up to the summit of Kilimanjaro and to the icy heights of the Argentine Andes, and it never once failed to locate my exact position on earth within about 4 feet. Also useful when you need a helicopter to pick you out of a stormy mess in Papua New Guinea or when navigating the non-existent roads of outer Mongolia.