The GPS and Its Place in Wilderness Navigation
Any GPS is as reliable as the batteries in it. I carry one whenever I go into the backcountry, but never without a topo map of the area and compass. (In fact, my survival kit has a backup compass in it, too.) Several times, in terrain as varied as high desert and rainforests, my GPS has let me down. The map and compass never have! http://tinyurl.com/yk7ngjc

