Garmin GT23M-TH Stainless Steel, TH Mount Transducer, Mid-Band CHIRP/CHIRP DownVü - 260/455kHz, 500W, 8-Pin

The Garmin GT23M-TH Stainless Steel, TH Mount Transducer delivers professional-grade sonar imaging for serious anglers and boaters who demand clarity in coastal and offshore environments. This thru-hull mounted transducer combines dual-frequency CHIRP technology with DownVü scanning sonar to reveal structure, bottom composition, and fish location with exceptional precision. Built for reliability in salt water and freshwater applications, the GT23M-TH is the choice of captains and guides who trust their electronics to perform when conditions matter most.

The transducer operates across mid-band frequencies of 260/455 kHz with 500 watts of transmit power, ensuring strong signal penetration and high-resolution returns even in rough seas or deep water. Its stainless steel construction resists corrosion and marine fouling, critical for hull-mounted installations exposed to constant saltwater contact. The 8-pin connector integrates seamlessly with compatible Garmin sonar units, while the thru-hull design eliminates the performance trade-offs common with transom or shoot-through-hull alternatives—water column imaging remains sharp and uncompromised across a wide range of vessel speeds.

Installation requires proper hull preparation and ballast, making professional fitting recommended for optimal performance and longevity. This transducer pairs with Garmin's ECHOMAP and legacy sonar systems that support CHIRP DownVü sonar, providing depth to 2,300 feet depending on water conditions and frequency selection. Commercial operators, tournament anglers, and weekend boaters alike benefit from the GT23M-TH's dependable real-time imaging, which consistently outperforms single-frequency alternatives when identifying baitfish schools, thermoclines, and bottom-hugging structure.