Amazing detail and color meet high-sensitivity GPS performance in the GPSMAP 76Cx and 76CSx. These mariner-friendly handhelds are WAAS-enabled, waterproof, and they’ll even float if dropped overboard. They’re set to go the distance on land or sea thanks to a long battery life and 128 megabytes of microSD card memory for loading optional MapSource® detail: BlueChart®, City Navigator™, TOPO, and more. The 76CSx adds electronic compass and barometric altimeter for extremely accurate heading and elevation readings. Automatic pressure trend recording even lets you can keep an eye on the weather.