Humminbird 997c SI Combo NVB 8-Inch Waterproof Marine GPS and Chartplotter (Navionics Gold and HotMaps Premium Charts Pre-loaded) Top of the line fish finder and 16-channel WAAS/EGNOS GPS chartplotter, packed with every feature 8-inch TFT LCD screen with 480 x 800 lines of resolution in full color Revolutionary 800 kHz side-imaging sonar with 180-degree coverage to 360 feet to either side Built-in UniMap of USA inland lakes, rivers and coastal areas, and pre-loaded with Navionics Gold and HotMaps cartography Measures 11.25 x 6.75 x 4.25 inches (W x H x D), and backed by limited 1-year warranty