APPENDIX 2 DIGITAL INTERFACE
AP-13
LRF - See “LRF - Long-range function” on page AP-8.
LR1 - Long-range reply with destination for function request “A”
LR2 - Long-range reply for function requests “B, C, E, and F”
LR3 - Long-range reply for function requests “I, O, P, U and W”
LRI - See “LRI - Long-range interrogation” on page AP-9.
NAK - Negative acknowledgment
SSD - See "SSD - AIS ship static data" on page AP-10.
$**LR1,x,xxxxxxxxx,xxxxxxxxx,c--c,c--c,xxxxxxxxx*hh<CR><LF>
1 2 3 4 5 6
1. Sequence number
2. MMSI of responder
3. MMSI of requester (reply destination)
4. Ship's name (1 to 20 characters)
5. Call sign (1 to 7 characters)
6. IMO number, (9-digit number)
$**LR2,x,xxxxxxxxx,xxxxxx,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x.x,T,x.x,N*hh<CR><LF>
1 2 3 4 5 6 7 8
1. Sequence number
2. MMSI of responder
3. Date (ddmmyy)
4. UTC of Position
5. Latitude - N/S
6. Longitude - E/W
7. Course over ground, degrees True
8. Speed over ground, Knots
$**LR3,x,xxxxxxxxx,c--c,xxxxxx,hhmmss.ss,x.x,cc,x.x,x.x,cc,x.x*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10 11
1. Sequence number
2. MMSI of responder
3. Voyage destination (1 to 20 characters)
4. ETA date (ddmmyy)
5. ETA time
6. Draught
7. Ship/cargo
8. Ship length
9. Ship breadth
10. Ship type
11. Persons (0 to 8191)
$**NAK,cc,ccc,c--c,x.x,c--c *hh<CR><LF>
1 2 3 4 5
1. Talker identifier
2. Affected sentence formatter
3. Unique identifier
4. Reason code for negative ackowledgment (0=Query functionality not supported, 1=Sentence
formatter not supported, 2=Sentence formatter supported, but not enabled; 3=Senetence
formatter supported and enabled, but temporarily unavailable; 4=Sentence formatter
supported, but query for this sentence formatter is not supported; 5=Access denied, for
sentence formatter requested; 6=Sentence not accepted due to bad checksum;
7=Sentence not accepted due to listener processing issue; 8,9=Reserved for future use;
10=Cannot perform the requested operation; 11=cannot fulfill request or command because
of a problem with a data field in the sentence; 12 to 48=Reserved for future use; 49=Other
reason as described in field 5.)
5. Negative acknowledgment’s descriptive text
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