NMEA MWD
The NMEA MWD datagram provides the direction from which the wind blows across the earth's surface. The wind direction is related
to north. The datagram also offers the wind speed.
NMEA MWV
The NMEA MWV datagram provides the direction from which the wind blows relative to the vessel's centre line.
NMEA VWR
The NMEA VWR datagram provides the wind angle in relation to the vessel's heading, and the wind speed measured relative to
the moving vessel. This datagram format is not recommended for use in new designs. It has been replaced by the MWV datagram format.