Its time you started fishing with the power of CHIRP sonar.The Garmin echoMAP series of chartplotter/sonar pushbutton combos have built-in Garmin HD-ID traditional sonar plus ClearVü that provides the clearest scanning sonar images on the water. They have the most accurate GPS for its class. This version is preloaded with LakeVü HD inland cartography and includes a GT22-TM transducer.ClearVü scanning sonar is built into echoMAP cv combos. ClearVü gives you the clearest, nearly photographic sonar view of whats below your boat. It uses an all-in-one HD-ID and ClearVü transducer allowing you to have both traditional and ClearVü images on your screen. The Garmin CHIRP difference:The built-in sonar capabilities of echoMAP 53cv include CHIRP sonar, the most sophisticated sonar technology available for the fishing and boating public. CHIRP sonar provides amazingly clear target separation and definition because it puts even more energy onto the target than traditional sonar. It also includes sonar-recording capability that coordinates the timing of the sonar return with your boat's position and saves digital information for playback on a computer usingHomePort planning software. Use the user data sharing cable to share waypoints and routes between multiple devices. Clearest scanning sonar images:Garmin ClearVü scanning sonar gives you a nearly photographic, wide image of what passes below your boat. You clearly see structure, submerged objects and fish. Traditional Garmin HD-ID sonar and ClearVü scanning sonar are combined into 1 transducer. Also provides HD-ID support for Minn Kota and MotorGuide trolling motors with integrated transducers. Preloaded LakeVü HD maps:These highly detailed freshwater maps include 17,000+ U.S. lakes, rivers and reservoirs (more than double the number of preloaded lakes of any competitor). That number also includes more than 13,000 HD lakes with 1-foot contours shoreline to shoreline. LakeVü HD gives you excellent detail of underwater features, plus Shallow Water Shading allows you to designate a minimum depth. It also shows interstates, highways, general roads and bridges, designated fishing areas, docks, boat ramps, marinas and campgrounds. Quickdraw Contours to create your own HD maps:Instantly create personalized HD fishing maps onscreen