The Garmin GT15M-TM Transom Mount Transducer is a rugged 8-pin sonar solution built for serious anglers who demand reliable performance from a transom-mounted setup. It delivers crisp bottom detail and unmistakable fish arches, making deep-water fishing more predictable and enjoyable.
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Transom-mount design: Versatile, boat-friendly installation that minimizes hull interference and works with a wide range of hulls.
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8-pin connection: Reliable data transfer and seamless compatibility with Garmin fish-finding systems.
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Mid-band CHIRP traditional sonar: 85–165 kHz for clear bottom detail and high-contrast target separation.
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600 W power rating: Strong sonar returns that stay readable in variable water conditions.
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Depth capability up to 1,900 feet: Probe deep-water structures, ledges, and thermoclines.
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Clear bottom definition and wide arches: Crisp bottom signals and broad fish arches for accurate navigation and lure placement.
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Easy installation: Clear instructions help you install with confidence and avoid hull damage.
This transducer helps you identify underwater structure, drop-offs, and fish targets with reliable separation, so you can plan crossings, cast to promising ambush points, and optimize lure presentation. The 1,900-foot depth rating opens up deep-water hotspots, while the transom-mount design minimizes interference and simplifies installation on a broad range of boats. With Garmin’s mid-band CHIRP performance, you’ll experience consistent, actionable sonar data that supports confident decisions on every trip.
