Garmin GT30-TM DownVü™/SideVü™ 12-Pin Transom Mount Transducer f/GCV™ 10 - 20' Cable

Upgrade your boating adventures with the Garmin GT30-TM transom mount transducer, a game-changer for anglers chasing fish in shallow waters. This powerhouse delivers crystal-clear DownVü and SideVü scanning sonar images, revealing structure, baitfish schools, and trophy catches lurking below and beside your vessel. Unlike basic sonar, its CHIRP technology sweeps across frequencies for sharper details, helping you pinpoint spots where others might miss out.

Why Choose the GT30-TM for Your Next Fishing Trip?

Shallow water fishing demands precision, and the GT30-TM excels here. Mounted on your transom, it paints a vivid picture of the underwater world without the clutter of traditional 2D sonar. Imagine gliding over flats or navigating skinny water, spotting wrecks, drop-offs, and fish holding tight to the bottom—all in real time. The built-in fast-response temperature sensor adds another layer, tracking water temp changes that signal feeding frenzies or migrations. Anglers report landing more fish by interpreting these detailed scans, turning casual outings into limit-filling days.

Advanced Scanning Capabilities

• DownVü Mode: Hyper-detailed downward views rival live footage, showing fish arches and bottom composition up to exceptional depths.
• SideVü Mode: Scans port and starboard up to hundreds of feet, perfect for searching along shorelines, channels, or submerged timber without repositioning.
• CHIRP Excellence: Dual-frequency operation (455 kHz and 800 kHz bands) eliminates interference and boosts target separation in varied conditions.

Robust Specs for Reliable Performance

Seamless Installation and Setup

DIY-friendly for most boat owners, the transom mount secures easily with included hardware. Select a spot 1/3 from the transom's center, away from strakes or prop wash for clean readings. Angle it parallel to the waterline at speed—trim up slightly during tests. Common pitfalls? Bubbles from hull strakes; sand or wax the mounting surface for a solid bond. Once wired to your black box sonar unit, calibrate in calm water for peak sensitivity. Pro tip: Pair with a Garmin chartplotter for split-screen views, overlaying sonar on maps for unbeatable navigation.

Real-World Applications and Tips

From bass boats probing creeks to offshore rigs scanning reefs, this transducer shines in freshwater and saltwater alike. In murky bays, crank up the higher frequency for finer resolution. Adjust gain manually to cut noise during high-speed runs. Maintain it by rinsing after saltwater use and checking cable integrity seasonally. Users rave about its edge in tournaments, where split-second decisions on structure mean the difference between placing and packing up early.

Frequently Asked Questions