Garmin GPSMAP 536s 5-Inch Waterproof Marine GPS and Chartplotter with Sounder Compact chartplotter with 5-inch VGA display, high-sensitivity GPS receiver, and included sounder NMEA 2000 certified for seamless integration with the Garmin marine lineup; XM weather and radio compatible Built-in, satellite-enhanced basemap preloaded with U.S. Inland Lakes and easy to use interface Accepts BlueChart g2 Vision cards for added features such as high-res satellite imagery, 3-D views, Auto Guidance Powerful dual-frequency transom-mount transducer clearly illustrates depth contours, fish targets and structures