Make sure you can find your way through the water with the Garmin echoMAP Plus 43sv Chartplotter with GT20 Transducer. This unit comes with a 4.3-inch screen to help you view the water around you and uses traditional CHIRP sonar and CHIRP ClearVu scanning sonar to make it easy to see changes in depth. It is preloaded with LakeVü g3 maps with integrated Navionics® data, covering more than 17,000 total lakes. Many of the lake maps even provide 1-foot contours. Quickdraw Contours is a custom, HD map creation software that helps you map out your favorite water routes.