Garmin GT21-TH Thru Hull Transducer DownVu/Sonar
This thru-hull transducer provides ultra-clear sonar pictures of objects, structure and fish that pass below your boat. This traditional sonar and CHIRP DownVü transducer is optimized for depth performance and rough conditions.
The CHIRP DownVü element has a power rating of 500 W and operating frequencies of 260/455 kHz. The traditional sonar has a power rating of 600 W and operating frequencies of 50/200 kHz. It includes a built-in fast-response temperature sensor. For hull deadrises less than 25 degrees.
GT21-TH includes an 8-pin transducer with stainless steel stem, fairing block, isolation plate and bushings, mounting hardware and installation instructions. Follow the instructions carefully to avoid damaging your boat.