ESEE Pocket Nav Cards, 2.13" x 4.25" x .32". Of all the products ESEE/RAT has designed, the Pocket Nav Cards are at the top of the list of being the most useful for outdoorsmen. Designed to be used with a map and compass, the compact cards also allow the user to easily translate their GPS location to a map, as well as providing the inexperienced navigator with vital information on how to use map, compass and GPS. Includes micro notebook with waterproof paper, three plastic instruction cards and four clear overlay cards to determine grid locations, azimuths and distances. By ESEE Knives.