Garmin GT23M-TH Thru Hull Transducer

Garmin GT23M-TH Thru Hull Transducer delivers premium CHIRP sonar performance for coastal and offshore fishing. This stainless steel thru-hull mount pairs traditional CHIRP sonar with CHIRP DownVü scanning to show crisp fish arches and detailed underwater structures with superior target separation.

Designed for durability and accuracy, the GT23M-TH uses an 8-pin connector and offers dual CHIRP elements: Traditional CHIRP 80-160 kHz for broad coverage and up to 600 W, and CHIRP DownVü 260/455 kHz for high-resolution vertical images with up to 500 W.

Max depth ranges up to 1,800 ft in Traditional mode and 1,000 ft in DownVü mode, making it ideal for both nearshore and deep-water environments. The beam characteristics provide clear separation: Traditional LF/HF - 24/13 degrees and DownVü 2.0 x 51 degrees at 260 kHz and 1.4 x 29 degrees at 455 kHz for precise bottom detail.

Key features and benefits:

• Thru-hull stainless steel transducer for robust marine performance
• Dual CHIRP sonar: Traditional CHIRP 80-160 kHz and DownVü CHIRP 260/455 kHz
• 600 W (Traditional) and 500 W (DownVü) transmit power for strong, clear returns
• Max depth: 1,800 ft traditional; 1,000 ft DownVü
• Beam details: Traditional LF/HF - 24/13 degrees; DownVü 2.0 x 51 degrees at 260 kHz and 1.4 x 29 degrees at 455 kHz
• 30 ft cable length for flexible installation
• Includes transducer, stainless steel stem, fairing block, isolation plate and bushings, extension cable, mounting hardware, and documentation

Installation and compatibility

Follow the included instructions carefully to ensure a secure installation and to avoid damage to your boat. The GT23M-TH is designed for compatibility with Garmin marine displays that support CHIRP traditional sonar and CHIRP DownVü scanning.

What’s in the box

• GT23M-TH transducer
• Stainless steel stem
• Fairing block
• Isolation plate and bushings
• Extension cable
• Mounting hardware
• Documentation