Garmin GT15M-THF 20 Degree 600W SS Thru-Hull Transducer

Garmin GT15M-THF 20 Degree 600W SS Thru-Hull Transducer is engineered for streamlined performance on midsize fishing and cruising boats. This flush-mounted, stainless steel transducer minimizes drag while delivering pristine sonar returns, helping you locate fish, structure, and bottom depth with confidence.

Experience mid-band CHIRP sonar that delivers high-definition targets and clear structure down to 1,200 ft in saltwater and 1,900 ft in freshwater. The 8-pin, 600-watt transducer provides superior sensitivity, low noise, and excellent target separation, making it easier than ever to distinguish fish from cover and bottom features on a compatible display.

With a broad frequency range spanning 85–165 kHz, this transducer offers the ideal frequency for varying water conditions. The output supports a wide coverage area with crisp fish arches and accurate depth readings, so you can scan larger zones or zoom in on suspected hotspots.

Enjoy optimum ping sensitivity for enhanced sonar clarity and detailed bottom/topography. The design emphasizes high resolution and reliable performance, helping you differentiate individual fish and complex structures at a glance.

Designed for thru-hull installation, the stainless steel housing and stem provide a durable, flush-mount setup that minimizes drag and delivers precise beam orientation for clear sonar returns. The transducer also features Auto-ID technology for simple plug-and-play operation, automatically configuring the sonar to the transducer for hassle-free setup.

It’s configurable for various hull materials including fiberglass, composite, steel, aluminum, and wood. Multiple tilt versions accommodate hull deadrise angles from 0–20 degrees without a fairing block, ensuring optimal performance across a wide range of boat designs.

Key specifications:

• Transducer Frequency: Medium band CHIRP (85–165 kHz)
• Transducer Power: 600 W
• Transducer Beam Width: 24–16 degrees
• Maximum Depth: 1,200 ft saltwater; 1,900 ft freshwater
• Transducer Cable Length: 50 ft
• Depth/Temperature data: Depth, temperature
• Number of Pins: 8-Pin
• Deadrise/Transom Angles Supported: 0–20 degrees (16–24 degrees hull deadrise range)
• Housing Material: Stainless steel

In the box, you’ll find the GT15M-THF transducer along with the necessary mounting hardware and documentation to get you sonar-ready quickly. Upgrade your boat’s sonar capability with Garmin’s reliable through-hull performance and enjoy sharp, dependable returns that help you plan your next move on the water.