You already know how easy it is to use a Garmin plotter. Just turn it on and you'll be able to follow the simple menu right away. Everything is at your fingertips so you can quickly and easily plan a route to your destination. And most plotters in Garmin echoMAP ™ - and the GPSMAP® series have built-in sonar functions so you just need to connect a transducer if you want to use them. These include Garmin's market-leading fishfinder with or without CHIRP as well as ClearVü ™ and SideVü ™ scan kit, which provide the clearest scanning sonar images on the water.