Marport Scala - Page 135

Scala | V7 | Appendix
NMEA Sentence Format
First compliant
version
of Scala
MWD - Wind
Direction
& Speed
$--MWD, a.a,T,b.b,M,c.c,N,d.d,M*hh<CR><LF>
1.
$--: Talker identifier*
2.
MWD: Sentence formatter*
3.
a.a,T: Wind direction, 0° to 359° true*
4.
b.b,M: Wind direction, 0° to 359° magnetic*
5.
c.c,N: Wind speed, knots*
6.
d.d,M: Wind speed, meters/second*
7.
*hh: Checksum*
1.6.0.0
MWV - Wind
Speed & Angle
$--MWV,a.a,b,c.c,d,E *hh<CR><LF>
1.
$--: Talker identifier*
2.
MWV: Sentence formatter*
3.
a.a: Wind angle, 0 to 359 degrees*
4.
b: Reference, R = relative, T = true*
5.
c.c: Wind speed*
6.
d: Wind speed units, K = km/h, M = m/s, N = knots*
7.
E: Status, A = data valid V= data invalid*
8.
*hh: Checksum*
1.0.0.0
VBW - Dual
Ground/
Water Speed
$--VBW,a.a,b.b,A,c.c,d.d,A,e.e,A,f.f,A*hh<CR><LF>
1.
$--: Talker identifier*
2.
VBW: Sentence formatter*
3.
a.a: Longitudinal water speed (knots), "-" = astern*
4.
b.b: Transverse water speed, "-" = port*
5.
A: Status, A = data valid, V = data invalid*
6.
c.c: Longitudinal ground speed, "-" = astern*
7.
d.d: Transverse ground speed, "-" = port*
8.
A: Status, A = data valid, V = data invalid*
9.
e.e: Stern Transverse water speed, "-" = port*
10.
A: Status, A = data valid, V = data invalid*
11.
f.f: Stern Transverse ground speed, "-" = port*
12.
A: Status, A = data valid, V = data invalid*
13.
*hh: Checksum*
1.4.0.0
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