Airmar LB150 User Manual

Page 25

LB150 WeatherStation Technical Manual revision 0.013

Proprietary and Confidential

PRELIMINARY - DRAFT

NMEA 0183 TRANSMITTED SENTENCE

$GP

VTG

Summary

NMEA 0183 standard Course Over Ground and Ground Speed.

Syntax

$GPVTG,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh

Fields

<1>

Course Over Ground, degrees True, to the nearest 0.1 degree

<2>

T = True

<3>

Course Over Ground, degrees Magnetic, to the nearest 0.1 degree

<4>

M = Magnetic

<5>

Speed Over Ground, knots, to the nearest 0.1 knot

<6>

N = Knots

<7>

Speed Over Ground, km/hr, to the nearest 0.1 km/hr

<8>

K = km/hr

<9>

Mode indicator:
A = Autonomous mode

D = Differential mode

E = Estimated (dead reckoning) mode

M = Manual input mode

S = Simulator mode

N = Data not valid
The only values transmitted by the LB150 WeatherStation for the

Mode indicator are A, D, and N.

Default State

Enabled. Transmitted once per second.

Notes

This sentence may be enabled or disabled via the $PAMTC,EN,VTG command.

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