Description
Use this fairing block to position your Garmin GT21 GT23 GT41 GT50 or GT51 series of thru-hull scanning transducers parallel to the water line for increased sonar accuracy. If the deadrise angle of your mounting location exceeds 5 degrees you should use a fairing block to mount the device.
Upgrade Options
Alternative or higher-specification products you may also wish to consider.
Garmin
Garmin GT23M-TH 8 Pin Thru-Hull Transducer
Perfect for coastal and offshore fishermen who want CHIRP traditional sonar and CHIRP ClearVü scanning sonar with a stainless steel stem, this thru-hull mount transducer consistently displays clear and crisp fish arches with superior target separation as well as clear definition of structure below the boat. The 8-pin transducer features mid-band CHIRP traditional sonar (80-160 kHz) and has a power rating of 600 W. The CHIRP ClearVü (260/455 kHz) element has a power rating of 500 W. For installation, follow the included instructions carefully to avoid damaging your boat.
Garmin
Garmin GT21-TH 8 Pin Thru-Hull Transducer
Perfect for coastal and offshore fishermen who want traditional sonar and CHIRP ClearVü scanning sonar with a stainless steel stem, this thru-hull mount transducer consistently displays clear and crisp fish arches with superior target separation as well as clear definition of structure below the boat. The CHIRP ClearVü 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.
