CLEAR, COLORFUL SONAR Choose from 7 new vivid color options to see fish and structure in maximum contrast and clarity on your 5” fishfinder. BUILT-IN SONAR Use the included GT20 transducer to get Garmin CHIRP traditional sonar and CHIRP ClearVü scanning sonar. WAYPOINT MARKING To catch more fish, you need to know where the fish are biting. Use waypoint marking for hot spots so you can easily find your way back.