Garmin gWind Race Transducer [010-01228-00]gWind Race Transducer Designed for racing sailboats it features a 3' straight pole to raise the transducer above the mast to remove turbulence errors. Features twin fin technology with three bladed propeller for more accurate True Wind Speed (TWS) in lighter air while the twin fin design gives a more stable True Wind Angle (TWA). The three bladed propeller, unlike a cups design, is always efficient. Combined with optic reading this transducer provides