GT15M-THF 20° 600W Thru-Hull Transducer

Designed for optimal sonar performance while reducing drag on midsize fishing and cruising boats, this flush-mounted, 600-watt mid-band CHIRP transducer delivers clear definition of fish arches, structure, and bottom depth on your display.

Midband CHIRP Traditional Sonar

This 8-pin, 600-watt stainless steel thru-hull transducer utilizes high-definition mid-band CHIRP sonar to clearly define fish targets and structures down to 1,200 feet in saltwater and 1,900 feet in freshwater.

Broad Frequency Range

Covering a medium frequency range from 85 to 165 kHz, this transducer provides the perfect frequency for various fishing conditions, offering wide coverage, crisp fish arches, and accurate depth readings.

Optimum Ping Sensitivity

Experience excellent sonar sensitivity with low noise, high resolution, and effective target separation, making it easier to distinguish between fish and structure on a compatible chartplotter display.

Thru-Hull Installation

Featuring a durable stainless steel housing and stem, this transducer ensures straightforward thru-hull flush mounting for minimal drag and optimal beam orientation for clear sonar returns.

Auto-ID Technology

Take advantage of Garmin's auto-identification technology for simple plug-and-play operation, allowing the sonar to automatically configure itself based on the transducer in use.

Fits Various Hull Types

Compatible with various boat hull materials including fiberglass, composite, steel, aluminum, and wood, this transducer offers multiple tilt versions that accommodate deadrise angles from 0 to 20 degrees without requiring a fairing block.