NMEA VWR datagram format
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.
Note
This datagram format is not recommended for use in new designs. It has been replaced by the MWV datagram format.
Format
$--VWR,x.x,a,y.y,N,z.z,M,s.s,K*hh<CR><LF>
Description
1 $—Talker identifier
2 VWRDatagram identifier
3 x.xWind angle (0 to 180 degrees)
4 aReference
•  L = Left
•  R = Right
5 y.y,NWind speed (knots)
6 z.z,MWind speed (metres/second)
7 s.s,KWind speed (kilometres/hour)
8 *hhChecksum