Garmin GPSMAP 76C 1.5-Inch Waterproof Marine GPS WAAS-enabled, 12 parallel channel GPS receiver; built-in quad-helix antenna with remote antenna capability 115-MB internal memory for loading MapSource detail, including marine cartography; USB connectivity for quick chart and map downloads Includes a built-in Americas Autoroute basemap with auto-routing capabilities, including highways, exits, and tide data; internal memory is also pre-loaded with a Marine Point database Position formats include Lat/Lon, UTM, Loran TDs, Maidenhead, MGRS, user grid, and more Trip computer provides odometer, stopped time, moving average, overall average, total time, max speed, and more