Designed for reduced drag and optimum sonar performance on midsize fishing and cruising boats, the Garmin GT12M Bronze Thru-Hull - 350W - 20 Degree is a flush-mounted, 350-watt mid-band CHIRP transducer that clearly defines fish arches, structure, and bottom depth on your display.
Midband CHIRP Traditional Sonar This 8-pin, 350-watt bronze thru-hull transducer delivers high-definition mid-band CHIRP sonar, producing crisp targets and reliable bottom readings—down to 800 ft in saltwater and 1,200 ft in freshwater.
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Broad Frequency Range Pulses across the 85–165 kHz medium frequency range to deliver a wide coverage area, clear fish arches, and accurate depth readings.
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Optimum Ping Sensitivity Excellent sonar sensitivity with low noise, high resolution, and good target separation so you can easily distinguish fish and structures on your chartplotter display.
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Thru-Hull Installation Durable bronze housing and stem enable straightforward flush mounting with minimum drag and ideal beam orientation for clear returns.
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Auto-ID Technology Simple plug-and-play operation that automatically configures the sonar to the transducer for hassle-free setup.
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Hull Compatibility Configurable for fiberglass, composite, and wood hulls, with tilt versions available to accommodate deadrise angles of 0–20° without a fairing block.
Performance at a glance
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Transducer Frequency: Medium band CHIRP (85–165 kHz)
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Transducer Power: 350 W
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Transducer Beamwidth: 24° – 16°
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Maximum Depth: 800 ft saltwater / 1200 ft freshwater
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Cable Length: 50 ft
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Depth/Speed/Temperature: Depth, temperature
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Housing Material: Bronze
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Deadrise/Transom Angles Supported: 0–20° (supports hull deadrise angles from 16° to 24° with appropriate setup)
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Manufacturer: Garmin
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Part Number: 010-02867-02
In the box, you’ll find the GT12M-THF transducer along with a jam nut, washer, and the documentation to get you up and running quickly.
