The Furuno GP37 is compact in size, yet big on features and performance. The GP37 Navigator is equipped with both a WAAS and a DGPS receiver. Its high-sensitivity 12-channel GPS receiver allows you highly accurate and reliable position fixing. The GP37 position fixes are 10 meters for basic GPS, 5 meters or better with DGPS, and 3 meters or better with WAAS. The redundancy of the GP37's receiver ensures that you will always have the most accurate position fix available. The GP37 runs with DGPS as the default setting in auto selection mode as this is usually the most stable signal available. In this mode, if the DGPS signal cannot be received for any reason, the WAAS mode is automatically selected. The GP37 uses the same 4.5" Silver Bright LCD screen as the GP32, and, like the GP32, it offers a variety of graphic displays including Track Plotter, Highway, Steering Display, and Nav Data. Navigation information including ship's position in Lat/Lon or Loran-C TDs, speed, course, range/bearing and ETA/TTG to a targeted waypoint, or MOB position can also be displayed. 4.9"H x 8.2"W x 3.4"D. Two-year warranty.