Airmar PB200 - Manual (Page 105)

PB200 WeatherStation User Manual revision 1.000
Proprietary and Confidential
99
NMEA 0183 TRANSMITTED SENTENCE
$WI
VWT
Summary
NMEA 0183 True wind angle in relation to the vessel’s heading, and true wind
speed referenced to the water. True wind is the vector sum of the Relative
(apparent) wind vector and the vessel’s velocity vector relative to the water along
the heading line of the vessel. It represents the wind at the vessel if it were
stationary relative to the water and heading in the same direction.
Syntax
$WIVWT,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>*hh
Fields
<1> Calculated wind angle relative to the vessel, 0 to 180°, left/right of
vessel heading, to the nearest 0.1 degree
<2> L = left, or R = right
<3> Calculated wind speed, knots, to the nearest 0.1 knot
<4> N = knots
<5> Wind speed, meters per second, to the nearest 0.1 m/s
<6> M = meters per second
<7> Wind speed, km/h, to the nearest km/h
<8> K = km/h
Default State
Enabled, but automatically prohibited until water speed is provided via the
NMEA 0183 input. Transmitted once per second when enabled and not
prohibited.
Notes
This sentence can be manually enabled or disabled via the $PAMTC,EN,VWT
command.