The Garmin GT15M-THF (0-degree Tilt) is a professional-grade thru-hull transducer designed for midsize fishing and cruising boats. It features a 600-watt power rating and Mid-band CHIRP technology, which is optimized to provide high-definition sonar returns while maintaining a flush profile against the hull to minimize drag.
The “0-degree” tilt version is specifically engineered for hulls with a deadrise angle between 0° and 7°. It is an excellent choice for fiberglass, wood, composite, steel, or aluminum hulls where you want a clean installation without a large fairing block.
Key Features
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Mid-band CHIRP (85–165 kHz): Provides superior target separation and crisp fish arches by sweeping through a range of frequencies.
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Flush-Mount Stainless Steel: The durable housing sits nearly level with the boat’s hull, reducing water turbulence and improving performance at high speeds.
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Optimum Sensitivity: Offers low noise and high resolution, making it easier to distinguish individual fish from bottom structure.
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Auto-ID Technology: Features a plug-and-play system that allows compatible Garmin chartplotters to automatically recognize and configure the transducer.
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RapidReturn™ Compatible: Optimized for faster sonar update rates for real-time feedback on your display.


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