giving stabilized pitch, roll and yaw data. Data output from Port
1 will be at 4800 baud while data from Ports 2 and 3 will be at
9600 baud; this message may be used in any device capable of
receiving this data rate. The Cetrek proprietary message format is
a stabilized heading output for use with Cetrek autopilots. Each
serial port can be independently programmed to output data at a
rate of 1 Hz to 20 Hz, selectable in 1 Hz increments. The default
data rate is 10 Hz.
NMEA1 Magnetic Heading (HDM)
Communication: 4800 baud, 1 start bit, 8 data bits, 1 stop bit,
no parity
Update rate: Selectable at 1 to 20 Hz (10 Hz default)
Sentence type: $HCHDM,XXX.X,M,* hh <cr> <lf>
Sentence breakdown: HCHDM NMEA talker and sentence ID
XXX.X Stabilized magnetic heading in
degrees and tenths
M Magnetic heading, ASCII hex
0x4D
* ASCII hex 0x2A
hh Checksum
cr Carriage return, ASCII hex 0x0D
lf Line feed, ASCII hex 0x0A
NMEA2 Magnetic Heading (HDG)
Communication: 4800 baud, 1 start bit, 8 data bits, 1 stop bit,
no parity
Update rate: Selectable at 1 to 20 Hz (10 Hz default)
Sentence type: $HCHDG,XXX.X, *hh <cr> <lf>
Sentence breakdown: HCHDG NMEA talker and sentence ID
XXX.X Stabilized magnetic heading in
degrees and tenths
* ASCII hex 0x2A
hh Checksum
cr Carriage return, ASCII hex 0x0D
lf Line feed, ASCII hex 0x0A
54-0161
142
TracVision G6 Technical Manual
Table F-1
NMEA1 Magnetic
Heading Output
Table F-2
NMEA2 Magnetic
Heading Output
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