APPX. 6 DIGITAL INTERFACE
AP-31
RMB: Recommended minimum specific navigation data
RMC: Recommended minimum specific GNSS data
SRP: System function ID resolution protocol
$**RMB,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 - 9.99), No use
3. Direction to steer (L/R), No use
4. Origin waypoint ID, No use
5. Destination waypoint ID, No use
6. Destination waypoint latitude (0.0000 - 9000.000)
7. N/S
8. Destination waypoint longitude (0.0000 - 18000.000)
9. E/W
10. Range to destination, nautical miles (0.000 - 10000), No use
11. Bearing to destination, degrees true (0.0 - 359.9), No use
12. Destination closing velocity, knots (-99.9 - 99.9), No use
13. Arrival status (A=Arrival circle entered or perpendicular passed, V=not entered/passed), No use
14.
Mode indicator (A= Autonomous D= Differential mode E=Estimated (dead reckoning mode)
M=Manual input mode S= Simulator N=Data not valid)
$**RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,ddmmyy,x.x,a,a,a*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10
11 12 13
1. UTC of position fix (000000 - 235959)
2. Status (A=data valid, V=navigation receiver warning)
3. Latitude (0.0000 - 9000.0000)
4. N/S
5. Longitude (0.0000 - 18000.0000)
6. E/W
7. Speed over ground, knots (0.0 - 9999.9)
8. Course over ground, degrees true (0.0 - 359.0)
9. Date (010100 - 311299)
10. Magnetic variation, degrees E/W (0.0 - 180.0/NULL), No use
11. E/W
12. Mode indicator (A= Autonomous D= Differential mode E=Estimated (dead reckoning) mode)
M=Manual input mode S= Simulator N=Data not valid)
13. Navigational status indicator. No use
\s:ccxxxx*hh\$**SRP,x,hhhhhhhhhhhh,c--c*hh<CR><LF>
1 2 3 4
1. Reported SFI of the transmitter
2. Instance number for interface redundancy (i.e. number of physical port for identical
SFI), null if interface redundancy not in use. The instance numbers shall be ordinal
with no skipping (1, 2, 3,…).
3. Reported MAC address used by SFI, 48bit hexadecimal number, for example,
32613C4EB605.
4. Reported IP address used by SFI as text string, for example, 239.192.0.1.
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