Amazon.com: Garmin Striker 7SV with Transducer, 7" GPS Fishfinder with Chirp Traditional, ClearVu and SideVu Scanning Sonar Transducer and Built in Quickdraw Contours Mapping Software, 7 inches (010-01874-00) : Electronics
The Garmin Astro 220 DC 30 Bundle GPS Dog Tracking System ($599.95 at Amazon.com, Sears, and REI) is designed for hunters and sportsmen but it also works for adventurers who run or