Airmar LB150 - Manual (Page 18)

LB150 WeatherStation Technical Manual revision 0.013
Proprietary and Confidential
PRELIMINARY - DRAFT 15
NMEA 0183 TRANSMITTED SENTENCE
$WI
MDA
Summary
NMEA 0183 standard Meteorological Composite.
Syntax
$WIMDA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,
<12>,<13>,<14>,<15>,<16>,<17>,<18>,<19>,<20>*hh
Fields
<1> Barometric pressure, inches of mercury, to the nearest 0.01 inch
<2> I = inches of mercury
<3> Barometric pressure, bars, to the nearest .001 bar
<4> B = bars
<5> Air temperature, degrees C, to the nearest 0.1 degree C
<6> C = degrees C
<7> Water temperature, degrees C (this field left blank by WeatherStation)
<8> C = degrees C (this field left blank by WeatherStation)
<9> Relative humidity, percent, to the nearest 0.1 percent
<10> Absolute humidity, percent (this field left blank by WeatherStation)
<11> Dew point, degrees C, to the nearest 0.1 degree C
<12> C = degrees C
<13> Wind direction, degrees True, to the nearest 0.1 degree
<14> T = true
<15> Wind direction, degrees Magnetic, to the nearest 0.1 degree
<16> M = magnetic
<17> Wind speed, knots, to the nearest 0.1 knot
<18> N = knots
<19> Wind speed, meters per second, to the nearest 0.1 m/s
<20> M = meters per second
Default State
Enabled. Transmitted once per second.