Raymarine Wireless Mast Rotation Transmitter [T221] Hunting & Fishing | Filet Tables Uniden's SM81 Marine VHF Speaker

Uniden's SM81 Marine VHF Speaker Microphone replaces Uniden's HHSPM

professional anglers

Owner's Manual (pdf)

Low-profile inflation handle to prevent snagging and cause inadvertent inflation

Raymarine Wireless Mast Rotation Transmitter [T221] Hunting & Fishing | Filet Tables Uniden's SM81 Marine VHF SpeakerThis unique transmitter compensates for the movement of a rotating mast to ensure that you get the most accurate wind readings at all times. Operating as a wireless device on a Micronet network the Mast Rotation Transmitter compares compass information from the boat with its own information and corrects the wind angle coming from a standard wind transmitter at the mast head. Features: No wires Solar powered Light weight Quick Guide (pdf)