A must-have for anyone using a GPS, map and compass. Contains 3 clear cards with 1:24,000, 1:25,000, 1:50,000, 1:100,000, and 1:250,000 map scales. Also includes two white cards with survival tips, signaling tips, instructions on how to read a topo map, how to adjust for declination, how to determine distance traveled, how to use UTM with your GPS and compass, and how to travel an azimuth. Printed on 30 Mil plastic credit card stock.