2020-01-26, 12:26 PM
(2020-01-26, 02:36 AM)BeMarek Wrote: Hello,
I am scratching my head on this as to my understanding any wind measuring device, reads apparent wind. Now what I read from the several devices' guides the devices output MWV (wind speed and angle), not VMR (Relative Wind Speed and Angle) sentences. Anybody knows why?
MWV is recommended >
Quote:VWR - Relative (Apparent) Wind Speed and Angle NMEA 0183 Sentences Not Recommended for New Designs Approved by the NMEA 0183 Standard Committee as of October 1, 2008 Wind angle in relation to the vessel's heading and wind speed measured relative to the moving vessel. The use of $--MWV is recommended.https://www.nmea.org/Assets/100108_nmea_...esigns.pdf
The 2nd field in MWV should be 'R' for apparent wind , 'T' for true wind. Just tried it sending a MWV to sigK with 'r' then 't', R gets mapped to environment.wind.angleApparent and 'T' to environment.wind.angleTrueWater.
Quote:MWV Wind Speed and Angle 1 2 3 4 5 | | | | | $--MWV,x.x,a,x.x,a*hh
1) Wind Angle, 0 to 360 degrees
2) Reference, R = Relative, T = True
3) Wind Speed
4) Wind Speed Units, K/M/N
5) Status, A = Data Valid
6) Checksum