Garmin echoMAP chirp 44Cv chartplotter has 4.3-inch color display with keypad control, includes transducer with chirp and chirp ClearVü, preloaded BlueChart g2 charts for the coastal U.S, includes Quickdraw contours custom HD map creation software, internal 5 Hz GPS updates position and heading 5 times per second, clearer scanning sonar shows more of what is in the water around your boat, this high-frequency sonar gives near-photographic images with detailed representations of objects, structure and fish, chirp sonar sends a continuous sweep of frequencies which provides a wider range of information, chirp sonar is able to create crisper fish arches with better target separation.