You probably already know how to use a Garmin chartplotter. It is that intuitive. Just turn it on and you can quickly follow the simple menu. Everything is at your fingertips to quickly and easily plan your route and set your course. And most Garmin echoMAP™ and GPSMAP® chartplotters are available combined with built-in sonar capabilities. These include advanced HD-ID™ sonar, CHIRP sonar and Garmin DownVü™ and SideVü™ scanning sonar, which provides the clearest scanning sonar images on the water.