Garmin GT56UHD-TM Transom Mount Transducer [010-13073-00]GT56UHD TM Transom Mount Transducer Less time finding. More time fishing. The GT56 transducer is the ultimate all in one sonar solution, featuring Ultra High Definition SideV scanning sonar with 20% greater range at 1 MHz, Ultra High Definition ClearV scanning sonar and amazingly clear high wide CHIRP traditional sonar. With three scanning sonar frequencies, youll get top performances at all depths. High wide CHIRP traditional sonar shows crisp fish