The GPSMAP 76 has a built-in basemap containing nautical navigation aids such as lights, buoys, sound signals and day beacons along with a worldmap of cities, lakes, rivers, interstates and exits. Also the GPSMAP 76 includes 8-megabyte storage capacity for points of interest detail from one of Garmin's CD-ROMs. The GPSMAP 76 is completely waterproof and comes in an attractive silver color to really make your dash look nice. Additional features include: 3-D highway page, built-in resetable trip log, RMI/Compass page audible alarms, 500 waypoints and 50 reversible routes, 12 channel WAAS receiver, internal quadrifilar antenna for greater accuracy, large high resolution 4 gray scale FSTN display (180 x 240 pixels), automatic track log, runs on 2 AA batteries for 18 hours and can be interfaced with any electronics with NMEA 0183. Includes; PC cable, wrist strap and user manual. Dimensions: 6.2"H x 2.7"W x 1.4"D.