Since the original publication of "The GPS Handbook" in 2003, advances in GPS technology have expanded the usefulness and flexibility of these now-essential devices for any outdoorsperson. This revised edition includes all the latest models of hand-held GPS units from Garmin, Magellan, Brunton and other major manufacturers and discusses new features (such as enhanced downloadable maps) that help make time in the outdoors safer, easier, and more fun with GPS. Also included is information on how GPS works, linking to laptops, cel phones and PDA's, co-ordinating with maps, software options, and much more.