Garmin GT20-TM Transom Mount DownVü 500W (CHIRP 455/800kHz); Traditional 500W (77/200kHz) Transducer w/Temp - 8-Pin

Discover Crystal-Clear Underwater Views with the Garmin GT20-TM Transducer

Imagine gliding across shallow waters, your eyes glued to the screen as vivid images of fish, structure, and the lake bottom unfold in real-time. The Garmin GT20-TM transom mount transducer delivers exactly that, blending traditional sonar arches with stunning CHIRP ClearVü scanning for an all-in-one fishing upgrade. Perfect for bass boats, kayaks, or any vessel chasing trophies in depths where precision matters most.

This rugged 8-pin powerhouse punches through water up to 1,900 feet on traditional 77/200 kHz sonar and 750 feet on ClearVü, all at a reliable 500W output. Its fast-response temperature sensor keeps you informed on water conditions, helping you pinpoint the perfect spot when fish are finicky.

Key Features That Set It Apart for Serious Anglers

• Versatile Mounting Options: Secure it to your transom or trolling motor, adapting to 0° to 70° deadrise angles for boats of all shapes without compromising performance.
• Superior Imaging: Traditional sonar shows classic fish arches with 45°/15° beamwidths, while ClearVü CHIRP (455 kHz: 2.5°x53°; 800 kHz: 1.6°x29°) paints photo-like down views of structure and baitfish schools.
• Extended Reach: 20-foot cable gives you flexibility for clean routing, away from clutter and interference.
• Built Tough: Engineered for marine environments, it withstands splashes, vibrations, and the daily grind of hardcore fishing trips.

What makes this transducer a game-changer? Unlike basic single-frequency units, its dual traditional and ClearVü setup lets you switch views seamlessly on compatible Garmin displays, revealing hidden details that separate casual outings from limit-filling days.

Performance Specs at a Glance

Additional perks include depth and temperature sensing, making it ideal for pairing with Garmin's ecosystem for comprehensive marine electronics setups.

Effortless Installation for Quick Setup

Mounting the GT20-TM is straightforward with included transom and trolling motor hardware. Position it parallel to the waterline, about 1/8 inch below the hull for optimal down-viewing. Route the 20-foot cable carefully through existing conduits to minimize noise from engines or props. Pro tip: Test in shallow water first to fine-tune the angle, ensuring bubble-free readings and sharp images. Most installs take under an hour, even for DIYers.

It's compatible with a wide range of Garmin fishfinders and chartplotters via the 8-pin connector, like those in the GPSMAP or ECHOMAP lines, unlocking split-screen views without extra adapters.

Maximize Your Fishing Success: Tips and Maintenance

To keep readings crisp, clean the face regularly with fresh water and a soft cloth—avoid abrasives that could scratch the ceramic element. In murky waters, toggle to higher ClearVü frequencies for tighter beams that cut through sediment. Anglers swear by its sensitivity in spotting suspended crappie or weed-line walleye, turning hunches into hauls.

For longevity, store it dry during off-seasons and inspect mounts seasonally. This transducer isn't just gear; it's your underwater scout, reliable season after season.