Furuno 455T-TM903 Side-Scan Transom Mount Transducer

The Furuno 455T-TM903 Side-Scan Transom Mount Transducer is purpose-built for anglers and boaters who demand real-time bottom imaging and structure detection below the waterline. If you've spent years reading traditional sonar and know the limitations of single-beam transducers, this side-scan unit delivers a fundamentally different view—one that reveals fish holding areas, drop-offs, and underwater hazards with unprecedented lateral clarity. Mounted at the transom, it gives you 360-degree awareness without the need for through-hull installation, making it ideal for center console boats, fishing vessels, and recreational cruisers where hull penetration isn't practical or desired.

Side-scan sonar operates by transmitting high-frequency sound beams perpendicular to your vessel's track, painting a detailed map of the seafloor and suspended targets as you move forward. The 455T-TM903's transom-mount design positions the transducer at the stern where it remains submerged at operational speeds, offering stable, consistent image quality without the depth-dependent signal loss that hampers traditional downward-looking transducers in shallow to moderate depths. Furuno's engineering ensures solid target separation and contrast, allowing you to distinguish between bedrock, sand, vegetation, and fish with confidence. At 5 pounds, the transducer is rugged enough for saltwater and freshwater environments, with a design optimized for the dynamic pressure environment of a moving hull.

This transducer pairs seamlessly with compatible Furuno navigation and sonar systems, giving tournament anglers, charter captains, and serious recreational boaters the edge they need to locate structure and read the water column in real time. Transom mounting makes installation straightforward on most hull configurations—no drilling, no risk to structural integrity. Whether you're working offshore reefs, inland impoundments, or coastal shallows, the Furuno 455T-TM903 transforms your sonar suite from a passive depth-finder into an active fish-finding instrument that reveals what conventional single-beam transducers cannot.