Raymarine i50 Speed System With ST900/P120 Retractable Speed/Temp Thru-Hull

The Raymarine i50 Speed System With ST900/P120 Retractable Speed/Temp Thru-Hull is a marine-grade speed and water temperature display built for serious boaters and anglers who demand precise, real-time performance data. Whether you're racing competitively, fishing distant waters, or navigating variable conditions, this integrated system delivers the accuracy and visibility required on open water—day or night. The retractable thru-hull sensor design eliminates permanent drag penalties while protecting your transducer from shallow-water damage and debris.

Built on Raymarine's proven SeaTalk ecosystem, the i50 integrates seamlessly with modern NMEA2000 and SeaTalk NG networks, allowing you to merge speed and temperature data with your chartplotter, autopilot, and other connected instruments for comprehensive situational awareness. The oversized, high-contrast digits are engineered for instant readout in bright sunlight or twilight; red backlighting preserves night vision without washing out the display. The ST900/P120 thru-hull transducer uses reliable paddlewheel technology to measure boat speed across shallow and deep water, while the integrated temperature sensor monitors engine or ambient water conditions—critical for managing fuel efficiency, fish behavior prediction, and engine health.

Anglers benefit from water-temperature trending to identify thermoclines and locate active fish zones; tournament racers rely on the speed readout for consistent acceleration and trim validation. Installation is straightforward for vessels with existing thru-hull access, and the retractable mechanism allows service or replacement without hauling out. Compatible with all current Raymarine navigation systems, this display weighs just 12.5 lbs and mounts cleanly on helm or console—ideal for center consoles, express cruisers, and performance boats where deck space and reliability matter most.