The Garmin GPSMAP 188C Sounder combines GPS and chart-plotter capabilities with a depthsounder. The waterproof unit comes with a 5″ high-resolution, sunlight-readable, 16-color TFT display with backlit keypad. The 12-parallel-channel GPS is WAAS-enabled for better positioning accuracy. The 188C features audible alerts, storage of 3,000 waypoints and a worldwide basemap with U.S. tide data. The 500-watt sounder operates on dual frequencies – 50 and 200 kHz – and provides both deep- and shallow-water performance. The GPSMAP 188C Sounder has a suggested retail price of $1,485.70. Garmin International, Olathe, KS; (913) 397-8200; www.garmin.com.