Garmin GPS 76 is designed to provide precise GPS positioning using correction data obtained from the Wide Area Augmentation System (WAAS). GPS 76 features a built-in quad helix antenna for superior reception. Position accuracy to less than 3.3 feet/3 meters when receiving WAAS corrections. GPS 76 provides 1 megabyte of internal user memory to be used for storing downloaded Points of Interest data. Preloaded from the factory with worldwide cities (populations greater than 200,000) and nautical navigation aids such as lights, buoys, sound signals and day beacons, and is perfect for downloading points of interest detail from Garmin's line of MapSource CD-ROMs. GPS 76 is also preloaded with tide data for the United States. An extra-large display measuring 1.6" W x 2.2" H gives users a clear view of information. Waterproof case means the GPS 76 will keep working well even if it's been submerged in water. GPS 76 floats if accidentally dropped in the water. Navigation Features: Waypoints/icons: 500 with name and graphic symbol, 10 nearest (automatic), 10 proximity. Routes: 50 reversible routes with up to 50 points each, plus MOB and TracBack® modes. Tracks: Automatic track log; 10 saved tracks let you retrace your path in both directions. Trip computer: Current speed, average speed, resettable max. speed, trip timer and trip distance. Alarms: Anchor drag, approach and arrival, off-course, proximity waypoint, shallow water and deep water. Tables: Built-in celestial tables for best times to fish and hunt, sun and moon rise, set and location. Map datums: More than 100 plus user datum. Position format: Lat/Lon, UTM/UPS, Maidenhead, MGRS, Loran TDs and other grids, including user grid. Power Source: Two AA batteries (not included). Battery Life: Up to 16 hours. Size: 2.7" W x 6.2" H x 1.2" D (6.9 x 15.7 x 3.0 cm). Weight: 7.7 ounces. Display: 1.6" W x 2.2" H (4.1 x 5.6 cm) 180 x 240 pixels, high-contrast FSTN with bright backlighting. Case: Fully gasketed, high impact plastic alloy, waterproof to IEC 529 IPX7 standards. Temperature range: 5°F to 158°F (-15°C to 70°C). Includes: GPS 76 receiver, Database: Marine Point Database (Americas), PC interface cable, Wrist strap, Owner's manual, Quick reference guide