Operation and Installation CD401MR-SC
Date: 2022-09-26Page 20 of 48
Heading
The NMEA sentences VHW, VTG, THS, HDT, HDM and HDG are all supported for
receiving information about the heading. It is recommended to use THS instead of HDT,
and HDG instead of HDM when available. The deviation and variation parameters in
HDT are ignored.
If the same heading parameter is received from dierent talkers, the heading parameter
will be prioritized as shown below:
1. Gyro, north seeking (HE).
2. GPS (GP).
3. Compass, magnetic (HC).
4. Others.
An arrow is added on the text line to indicate which direction the bow turns. If no
change in heading from previous value, no arrow is displayed.
The heading value is always displayed with one decimal. Legal range for the heading to
be displayed, are values in the range from 0 to 359.9
o
.
screen:
Runtime
screen:
Direction of turn is to
port.
Direction of turn is to
starboard.
No change in
heading since last
message.
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