Airmar LB150 - Manual (Page 17)

LB150 WeatherStation Technical Manual revision 0.013
Proprietary and Confidential
PRELIMINARY - DRAFT 14
NMEA 0183 TRANSMITTED SENTENCE
$HC
HDT
Summary
NMEA 0183 standard Heading relative to True North
Syntax
$HCHDT,<1>,<2>*hh<CR><LF>
Fields
<1> Heading relative to True North
<2> T = True
Default State
Enabled. Transmitted twice per second.
Notes
This sentence may be enabled or disabled via the $PAMTC,EN,HDT command.
The data in field <1> is only provided if both magnetic compass heading and
magnetic variation values are available.