GARMIN GCV 20 Ultra HD Scanning Sonar Black Box

GCV 20 Ultra HD Scanning Sonar Black Box Add Ultra High-Definition Scanning Sonar to Your Compatible Chartplotter The easy-to-install, networkable GCV 20 sonar black box allows you to redefine clarity and detail. Add any of the 3 GT34UHD transducer models to see stunningly clear Ultra High-Definition ClearV and Ultra High-Definition SideV scanning sonars with frequencies ranging from 0.8 MHz (800