Specifications

APPENDIX
A
P-17
LRF – Long-range function
This sentence is used in both long-range interrogation and long-range interrogation replies.
The LRF-sentence is the second sentence of the long-range range interrogation request
pair, LRI and LRF.
$--LRF,x,xxxxxxxxx,c--c,c--c,c--c*hh<CR><LF>
| | | | | |
| | | | | +--6
| | | +--- 5
| | | +------ 4
| | +----------- 3
| +------------------- 2
+------------------------- 1
1. Sequence number, 0 to 9
2. MMSI of requestor
3. Name of requestor, 1 to 20 characters
4. Function request, 1 to 26 characters
5. Function reply status
6. Checksum
LRI – Long-range interrogation
The LRI-sentence contains the information that the AIS needs in order to determine if the
reply sentences need to be constructed.
$--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