The Garmin GT15M-IH In-Hull Transducer is a mid-band CHIRP solution designed to install inside a fiberglass hull, delivering precise depth readings at high speeds while reducing cavitation on the transom. It’s ideal for high-speed boats that want accurate bottom information without hull intrusion.
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In-Hull Installation: In-hull design for fiberglass hulls, reducing cavitation risk and preserving hull integrity.
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Frequency: CHIRP 85–165 kHz.
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Beam Width: 24° (LF) / 13° (HF) (-3 dB).
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Transmit Power: 600 W.
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Cable Length: 20 ft.
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Connector: 8-pin.
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Deadrise Compatibility: Supports hull deadrise angles from 0 to 25 degrees.
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Compatibility: Works with GT30-TM transducer and adapter cable to maintain depth at high speeds and enable trolling-speed scanning.
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Water Temperature Sensor: No.
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What's in the Box: GT15M-IH transducer; 4 plastic tanks; mounting hardware; documentation.
With in-hull installation, cavitation risk is minimized and hull integrity is preserved, making it ideal for high-speed boats. The CHIRP 85–165 kHz coverage and 600 W transmit power provide reliable depth and bottom information across a range of conditions. Pairing the GT15M-IH with GT30-TM and an adapter cable helps maintain depth at high speeds and enables trolling-speed scanning.
| 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 |
