The GPS 72 is a low-cost solution for land or marine navigation designed to provide precise GPS positioning using correction data obtained from the Wide Area Augmentation System (WAAS). The GPS 72 can provide position accuracy to less than three meters when receiving WAAS corrections. This rugged, waterproof, unsinkable GPS receiver offers a large, 4-level grayscale screen. It's designed as the next generation in basic, entry-level Garmin GPS. Features include: * Built-in quad helix receiving antenna * High-contrast FSTN, 4-level gray scale (120 x 160 pixels) display * Backlit display and keypad * Permanent user data storage; no memory battery required * Water resistant, IEC-529, IPX7 (Submersible 1 meter @ 30 minutes) and floatable * 500 user waypoints with name and graphic symbol; 50 reversible routes * Position formats include Lat/Lon, UTM, Loran TDs, Maidenhead, MGRS, and user grid * Audible alarms for anchor drag, arrival, off-course, proximity waypoint, and clock * "Large numbers" option for easy viewing * 1 MB internal memory for loading MapSource Points of Interest data * Trip computer provides odometer, stopped time, moving average, overall average, total time, max speed, and more * Automatic track log; 10 saved tracks let you retrace your path in both directions * Course and speed filtering * Built-in celestial tables for best time to fish, plus sun and moon calculations