Raymarine Wireless Mast Rotation Transmitter [T221] Brand_Polyform U.S. Heavy-duty stainless steel construction

Heavy-duty stainless steel construction

left and right rotation prop models with a variety of diameter and pitch options available for almost all boat types

Solid State Electronics

this unit will handle long hours and heavy weights in tough conditions

81300 SeaTalkng Reference Manual

Raymarine Wireless Mast Rotation Transmitter [T221] Brand_Polyform U.S. Heavy-duty stainless steel constructionThis 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)