Discover the reliability of the Raymarine B744V Bronze Thru-Hull Triducer, a multisensor powerhouse that delivers precise depth readings, accurate speed logs, and real-time water temperature data—all from a single, streamlined installation. Boaters trust this bronze housing for its durability against corrosion in saltwater environments, making it a go-to choice for fiberglass and wooden hulls on sailboats, powerboats, and offshore vessels. Whether you're navigating shallow bays or tracking fish in deeper waters up to 1200 feet, this 600-watt sensor operates seamlessly at both 50 kHz and 200 kHz frequencies, adapting to your cruising needs.

Key Advantages for Serious Boaters

The B744V stands out with its innovative design that minimizes drag and maximizes performance. The high-performance fairing—sold separately—allows the sensor to recess fully, ensuring a flush fit that reduces turbulence and improves speed accuracy. Its patented valve assembly is a game-changer: simply pull the insert for cleaning algae or winter storage, and the self-sealing mechanism keeps your hull watertight without draining the boat. This feature alone saves hours of hassle during maintenance seasons.

• Dual-Frequency Precision: 50 kHz for wide-area depth coverage (12° beam) and 200 kHz for detailed bottom scans (45° beam), handling hull deadrises up to 24°.
• Thru-Hull Simplicity: Requires just a 2-inch hole, perfect for retrofits or new builds.
• Extended Reach: 45-foot cable provides flexibility for routing to your display without signal loss.
• Robust Bronze Construction: Resists marine growth and withstands harsh conditions, backed by a limited 2-year warranty.

Effortless Integration with Your Marine Electronics

Pair the B744V with popular Raymarine instruments like the ST60+, ST290, or ST70 series (note: ST70 setups may need dedicated speed and depth pods). It feeds clean data to your fishfinder or chartplotter, enhancing situational awareness during fishing trips, racing, or long passages. The removable paddlewheel insert makes speed calibration straightforward—clean it on the hard and swap back in minutes. For optimal results, install on a flat hull section forward of props and keels, ensuring undisturbed water flow for spot-on log readings.

Installation Insights from Seasoned Installers

Prep your hull by marking a 2-inch circle and using a hole saw for a clean cut. Bed the thru-hull with marine sealant, torque to spec, and route the cable away from electrical noise sources. The bronze flange provides a secure seal on fiberglass or wood, but always fair the block to match your hull's angle for peak transducer efficiency. Pro tip: In variable deadrise hulls, the 12° to 24° tolerance shines, preventing air entrainment that plagues lesser sensors.

Real-World Performance on the Water

Anglers appreciate the sharp 200 kHz separation for marking structure and baitfish, while cruisers rely on 50 kHz for safe navigation in 1000+ feet. Speed data remains consistent across planing hulls, outperforming in-hull alternatives that suffer from hull distortion. Owners report fewer false readings compared to plastic transducers, thanks to the bronze's acoustic properties and stable mounting.

Frequently Asked Questions