The Garmin striker vivid 5cv features a chirp sonar clarity technology plus Garmin clear scanning sonar enhances the separation and gives you a nearly photographic, wide image of what passes below your boat. This fish finder works on new auto gain technology to see more fish in the water. This device has a built-in, high-sensitivity GPS to locate your current position quickly and precisely. The striker vivid 5cv features a Garmin quickdraw contours mapping software that creates and stores maps with 1 Contour for up to 2 million acres. Additionally, the built-in GPS lets you mark waypoints, create routes, and view the boat's speed.