GPS Navigation Guide Author:Jack W. Peters Your complete resource for outback navigation. Learn how to use your GPS with map, compass, computer, PDA and radio tracking. A fun, non-technical way to learn naviagation skills inspired by outdoor adventure ranging from Geocaching, search & rescue and off-road racing. Includes 142 photos and graphics and a special wrap around cover spiral sp... more »ine. Also includes a Topo Companion map ruler, a $5.99 value.« less