APPENDIX
AP-16
LRI - Long-range interrogation
$--LRI,x,a,xxxxxxxxx,xxxxxxxxx,llll.ll,a,yyyyy.yy,a,llll.ll,a,yyyyy.yy,a*hh<CR><LF>
| | | | | | | | | | | | |
| | | | | | | | | | | | +--- 9
| | | | | | | | | | +---+----- 8
| | | | | | | | +--+---------------- 7
| | | | | | +---+-------------------------- 6
| | | | +--+------------------------------------- 5
| | | +--------------------------------------------------- 4
| | +------------------------------------------------------------- 3
| +------------------------------------------------------------------- 2
+--------------------------------------------------------------------- 1
1. Sequence number, 0 to 9
2. Control Flag
3. MMSI of requestor
4. MMSI of destination
5. Latitude - N/S(north-east coordinate)
6. Longitude - E/W(north-east coordinate)
7. Latitude - N/S(south-west coordinate)
8. Longitude - E/W(south-west coordinate)
9. Checksum
OSD - Own ship data
$--OSD,x.x,A,x.x,a,x.x,a,x.x,x.x,a*hh<CR><LF>
| | | | | | | | | |
| | | | | | | | | +--------- 10
| | | | | | | | +----------- 9
| | | | | | | +-------------- 8
| | | | | | +------------------ 7
| | | | | +--------------------- 6
| | | | +------------------------ 5
| | | +--------------------------- 4
| | +------------------------------ 3
| +--------------------------------- 2
+------------------------------------ 1
1. Heading, degrees true
2. Heading status: A=data valid, V=data invalid
3. Vessel course, degrees true
4. Course reference, B/M/W/R/P(see note)
5. Vessel speed
6. Speed reference, B/M/W/R/P(see note)
7. Not used
8. Not used
9. Speed units, K(km/h) / N(Knots) / S(statute miles/h)
10. Checksum
NOTES - Reference systems(speed/course):
B = bottom tracking log
M = manually entered
W = water referenced
R = radar tracking(of fixed target)
P = positioning system ground reference
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