APPENDIX 3 DIGITAL INTERFACE
AP-10
HDG-Heading, Deviation and Variation
HDM-Heading, Magnetic
HDT- HeadingTrue
MTW-Water Temperature
RMB-Recommended Minimum Specific Navigation Information
$**HDG,x.x,x.x,a,x.x,a*hh<CR><LF>
1 2 3 4 5
1. Magnetic sensor heading, degrees (0.00 to 360.00)
2. Magnetic deviation, degrees (0.0 to 180.00)
3. E/W
4. Magnetic variation, degrees (0.0 to 180.00)
5. E/W
$ ** HDM, x.x, M *hh <CR><LF>
1 2
1. Heading, degrees (0.00 to 360.00)
2. Magnetic (M)
$**HDT, xxx.x,T*hh<CR><LF>
1 2
1. Heading, degrees (0.00 to 360.00)
2. True (T)
$**MTW,x.x,C<CR><LF>
1
1. Water temperature, degrees C (-9.999 to 99.999)
$GPRMB,A,x.x,L,CCCC,CCCC,xxxx.xx,a,xxxxxx.xx,a,xxx.x,xxx,xx.x,A,a*hh <CR><LF>
1 2 3 4 5 6 7 8 9 10 11 12 1314
1. Data status (A=Data valid, V=Navigation receiver warning)
2. Cross track error (NM) (0.00 to 9.99)
3. Direction to steer (L/R)
4. Origin waypoint ID
5. Destination waypoint ID
6. Destination waypoint latitude (0.0000 to 9000.000)
7. N/S
8. Destination waypoint longitude (0.0000 to 18000.000)
9. E/W
10. Range to destination, nautical miles (0.000 to 10000)
11. Bearing to destination, degrees true (0.0 to 359.9)
12. Destination closing velocity, knots (-99.9 to 99.9)
13. Arrival status (A=Arrival circle entered or perpendicular passed, V=Not entered/passed)
14.
Mode indicator (A= Autonomous D= Differential mode E=Estimated (dead reckoning
mode) M=Manual input mode S= Simulator N=Data not valid)
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