Garmin GT15M-IH Plastic, In-Hull, Mid-Band CHIRP Transducer is designed for fiberglass boats, letting you install the transducer inside the hull rather than on the transom. This setup minimizes cavitation and keeps depth readings stable and accurate at high speeds, helping you navigate and fish more confidently on fast-moving boats.
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In-hull installation for fiberglass hulls: Installed inside the hull rather than on the transom to minimize cavitation and maximize depth accuracy across hull deadrise angles from 0 to 25 degrees.
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Mid-Band CHIRP range: 85–165 kHz for traditional sonar performance with clear bottom detail and depth clarity.
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600 W output: Delivers strong, consistent sonar signals for long-range returns and sharp targets.
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8-Pin connector: Provides a secure, high-integrity connection for dependable operation.
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Included installation components: Includes 4 plastic tanks as part of the transducer assembly for robust installation options.
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GT30-TM compatibility: Works with GT30-TM via an adapter cable to maintain depth at high speeds and enable scanning at trolling speeds.
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Plastic housing designed for in-hull installation: Plastic transducer housing engineered for in-hull installation on fiberglass hulls.
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Easy installation guidance: Comes with instructions to help prevent damage to your boat during setup.
With in-hull installation, the GT15M-IH delivers reliable depth readings while you travel at speed and while trolling. The CHIRP range provides clear bottom detail and depth clarity, while the 600 W output ensures strong sonar returns across long ranges. The combination of the 8-pin connector, included installation components, and GT30-TM compatibility via adapter cable makes this transducer a practical, durable choice for anglers using fiberglass boats.
