The Eagle® IntelliMap™ 502c is a full size, stand-alone mapping GPS+WAAS, with 256-color, sunlight-viewable 320Vx240H pixel, high-resolution, TFT LCD, 5" diagonal display. The 12-parallel channel internal antenna GPS+WAAS reception with fast satellite lock-ons delivers precise tracking and position updates every second with the external EGC-12W receiver and internal antenna. Gives enhanced position accuracy to 3 m (under 10 ft) at select locations. Unit allows you to digitally record/play GPS trip details and display custom mapping with optional, reusable compact Multi-Media Cards (MMC) or Secure Digital (SD) memory cards. One waterproof slot for instantly expandable memory using a single 8MB-512MB card. Custom, built-in background map with enhanced continental U.S. and Hawaii detail including over 60,000 nav aids and 10,000 wrecks and obstructions in coastal and Great Lakes waters, as well as interstate exit services, and more inland navigation features. Accepts optional MapCreate™ Accessories Pack. Compatible with optional FreedomMaps™ (domestic and international), IMS Fishing Hot Spots®, and Navionics® GOLD™, CLASSIC™, XL3 and HotMaps™ electronic charts preloaded on digital media cards. Saves up to 1,000 waypoints, 1,000 event markers, and 100 routes (up to 100 waypoints/route), 100 savable plot trails with up to 10,000 points in any trail. 42 graphic icons are at your disposal to mark your favorite spots. 40 map zoom ranges - from 0.02 to 4,000 miles - with easy zoom-in/out control. Selectable on/off GPS alarms: Off Course, Arrival, and Anchor. One-touch M-O-B (man overboard) navigation. High-speed screen updates. Simplified fluorescent cold-cathode backlit screen and keypad. Internal back-up memory keeps your preferred GPS settings and stored GPS data safe and accessible for years. Rugged, reliable, completely sealed and waterproof casing ensures the unit functions even when used in harsh saltwater environments.