Garmin GT12M Bronze Thru-Hull is a flush-mount, low-drag 350-watt transducer designed for midsize boats, delivering high-definition mid-band CHIRP sonar with reliable depth and structure readings.
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Transducer Type: Bronze 8-pin thru-hull transducer for endurance and stable performance
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CHIRP Frequency: 85–165 kHz mid-band CHIRP for wide coverage and crisp arches
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Power: 350 W transducer power for low noise, high resolution, and improved target separation
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Beamwidth: 24°–16° beamwidth to balance coverage and display detail
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Depth Range: 800 ft saltwater and 1,200 ft freshwater capability
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Durability & Mounting: Bronze housing and stem for dependable thru-hull mounting with minimal drag and ideal beam orientation
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Auto-ID Technology: Plug-and-play operation that automatically configures sonar to the transducer
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Hull Compatibility: Configurable for fiberglass, composite, and wood hulls with tilt options for 0°–20° deadrise without a fairing block
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Onboard Sensing: Built-in depth, speed, and temperature sensing where supported
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Cable Length: 50 ft for flexible routing
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In the Box: GT12M-THF transducer, jam nut, washer, and documentation
With the GT12M, enjoy reliable, easy-installation sonar that adapts to your boat and hull type, exposing fish and structure with high clarity while keeping drag to a minimum. The Auto-ID feature makes setup effortless, and the 350 W power delivers crisp target separation even in deeper water or cluttered structure. Real-time depth, speed, and temperature sensing (where supported) help you navigate and fish with confidence across saltwater and freshwater environments.
