Meet the Garmin GT15M-IH In-Hull Transducer, a mid-band CHIRP transducer designed to install inside a fiberglass hull. This smart placement eliminates cavitation concerns on the transom while delivering rock-solid depth readings at high speeds. With CHIRP coverage from 85–165 kHz and a robust 600 W transmit power, the GT15M-IH is built for accuracy where it matters most.
Why choose the GT15M-IH
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In-hull installation reduces cavitation risks and preserves hull integrity, ideal for high-speed boats.
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Mid-band CHIRP sonar provides clear, detailed depth and bottom information across a wide range of conditions.
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Compatibility works with the GT30-TM transducer and an adapter cable to maintain depth at high speeds and enable trolling-speed scanning.
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Deadrise versatility supports a hull deadrise angle between 0 and 25 degrees.
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8-pin connection with 20 ft cable for flexible mounting options.
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Excellent beam performance with beam widths of 24° (LF) and 13° (HF) for balanced target separation and bottom tracking.
Specifications
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Frequency: CHIRP 85–165 kHz
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Beam Width (LF/HF): 24° / 13° (-3 dB)
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Transmit Power: 600 W
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Water Temperature Sensor: No
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Cable Length: 20 ft
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Connector: 8-pin
What's in the Box
- GT15M-IH transducer
- 4 plastic tanks
- Mounting hardware
- Documentation
Installation note: Follow the included instructions carefully to avoid damaging your boat. The GT15M-IH delivers reliable, high-performance depth readings while keeping the transducer protected inside your fiberglass hull.
| Frequency |
CHIRP 85-165 kHz |
| Beam Width (°) LF/HF (-3dB): |
24/13 |
| Transmit power |
600w |
| Water Temperature |
No |
| Cable length |
20 feet |
| Connector |
8 pin |
