Engineered for coastal and offshore anglers, the Garmin GT23M-TM Transom Mount Transducer delivers the winning combination of CHIRP traditional sonar and CHIRP DownVü scanning sonar. Its rugged plastic transom-mount design provides reliable performance and a clean signal under your boat, producing clear fish arches with excellent target separation and a sharp view of submerged structure.

• Dual CHIRP sonar for depth and detail: Traditional CHIRP 80-160 kHz at 600 W for broad-area fish finding, plus CHIRP DownVü 260/455 kHz at 500 W for high-resolution scanning below the boat.
• Depth capabilities: Traditional sonar up to 1,800 ft and DownVü up to 1,000 ft, so you can fish deeper water with confidence.
• Beam widths for precise imaging: Traditional 24°/13°; DownVü 2.0° × 51° at 260 kHz and 1.4° × 29° at 455 kHz, delivering crisp detail both wide and tight where you need it.
• Ready-to-install: 8-pin connector with a 30 ft cable; designed for easy integration with compatible Garmin systems.
• What’s in the box: GT23M-TM transducer, transom mount, mounting hardware, and documentation.
• Important installation note: Follow the included instructions carefully to avoid damaging your boat during mounting.

Whether you’re chasing inshore species or deep-water game, the Garmin GT23M-TM Transom Mount Transducer equips your sonar with clear arches and crisp structure, helping you locate fish more quickly and confidently on every voyage.