NMEA HDG datagram format
The NMEA HDG datagram provides heading from a magnetic sensor.
If this reading is corrected for deviation, it produces the magnetic heading.
If it is offset by variation, it provides the true heading.
Format
$--HDG,x.x,z.z,a,r.r,a*hh<CR><LF>
Description
1
$—
:
Talker identifier
2
HDG
:
Datagram identifier
3
x.x
: (
Degrees Magnetic
)
4
z.z,a
:
Deviation
(
Degrees Magnetic
),
East/West
•
E =
East
•
W =
West
5
r.r,a
Variation
(
Degrees Magnetic
),
East/West
•
E =
East
•
W =
West
6
*hh
:
Checksum
Related topics
NMEA datagram formats
I/O Datagram formats