T221 Wireless Mast Rotation Transmitter (T221) by Raymarine . Can Micronet wind information compensate for rotating masts? Tacktick is currently the only marine electronics manufacturer to provide an effective solution to this problem. By installing a T221 Mast Rotation Transmitter. This unit attached to the mast and will compensate for mast rotation allowing Apparent and True wind information to be generated correctly whatever the angle of the mast. A Micronet system equipped with a Fluxgate compass or Magnetic Heading from an external NMEA source is required along with the Mast Rotation Sensor.

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