Raymarine RVM-420 Stainless Steel Thru-Hull Pair, 20 Degree Deadrise & 10M Cable

The Raymarine RVM-420 Stainless Steel Thru-Hull Pair delivers the transducer solution serious anglers and boat owners trust for reliable sonar performance in saltwater and freshwater environments. Designed as a matched pair with complementary deadrise angles, these thru-hull transducers mount permanently below the waterline to eliminate the performance drift associated with portable or transom-mounted alternatives. Whether you're running a center console, express cruiser, or dedicated fishing platform, this system provides consistent depth reading, bottom definition, and fish detection that survives years of saltwater exposure and mechanical stress.

Each transducer in this Raymarine RVM-420 pair features marine-grade stainless steel construction engineered to withstand corrosion and impact from running in shallow water, rocky structure, and heavy seas. The 20-degree deadrise design matches most modern hull configurations, ensuring optimal acoustic coupling and beam angle alignment for your specific boat geometry. A 10-meter cable—approximately 33 feet—provides ample length for installations on vessels ranging from 20 to 45 feet, with built-in strain relief and sealed connectors that meet Raymarine's IP67 waterproofing standard. This robust cable management eliminates the guesswork on routing and reduces the risk of water intrusion at the display head.

Serious anglers, charter operators, and cruising boaters benefit most from permanent thru-hull installation because it isolates transducers from prop wash, trim movement, and speed-induced turbulence that plague portable alternatives. The pairing of two transducers allows for redundancy—critical when downtime costs fuel and time—and enables simultaneous forward and aft coverage on larger vessels. Professional marine electricians and experienced DIY installers will appreciate Raymarine's reputation for straightforward integration with existing glass cockpit systems, though thru-hull installation does require drilling and proper sealing procedures best handled during haul-out or new construction. This investment transforms your sonar capability from marginal to tournament-grade performance.