The Garmin GPS 38 is a marine navigator, which allows you to mark your favorite fishing spot, tree stand, camp site, etc. This Garmin 2.2 x1.5-inches GPS has TracBack feature, which retrace your previous steps easily. This Garmin marine navigator has a resetable trip odometer, graphic compass and highway steering guidance, which acts as a guide in water. The Garmin GPS 38 GPS has multiTrac8 operating system, which endlessly tracks and uses up to 8 satellites for quick, exact setting. Powered by 4 AA batteries, this Garmin 2.2 x1.5-inches GPS goes on for 20 long hours. This Garmin marine navigator is shielded with ultrasonically welded dry nitrogen, which adds to its durability making it truly waterproof.