GARMIN ECHOMAP UHD2 55cv with GT20-TM Transducer Get double the views with its built-in Garmin CHIRP traditional and ClearVü scanning sonars. With crisp, clear traditional sonar and brilliant ClearVü scanning sonar, the fish will have nowhere to hide. Its high-contrast vivid color palette make it easier than ever to distinguish between targets and structure, so you get a better look at what's under the water.