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APPENDIX 4 DIGITAL INTERFACE
AP-13
ACA-AIS channel assignment message
ACS-Channel management information source
ALR-Set alarm state
$--ACA,x,IIII.I, a,yyyyy.y,a,IIII.I,a,yyyyy.y,a,x,xxxx,x,xxxx,x,x,x,a,x,hhmmss.s*hh<CR><LF>
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1. Sequence number, 0 to 9
2. Region Northeast corner latitude
- N/S
3. Region Northeast corner longitude
- E/W
4. Region Southwest corner latitude
- N/S
5. Region Southwest corner longitude
- E/W
6. Transition Zone Size
7. Channel A
8. Channel A bandwidth
9. Channel B
10. Channel B bandwidth
11. Tx/Rx mode control
12. Power level control
13. Not used
14. In-use flag
15. Time of in-used change
$--ACS,x,xxxxxxxxx,hhmmss.ss,xx,xx,xxxx*hh<CR><LF>
6
5
4
3
2
1
1. Sequence number, 0 to 9
2. MMSI of originator
3. UTC at receipt of regional operating settings
4. UTC day, 01- to 31
5. UTC month, 01 to 12
6. UTC year
$--ALR,hhmmss.ss,xxx,A,A,c--c*hh<CR><LF>
| | | | | |
| | | | | +------------- 6
| | | | +----------------- 5
| | | +-------------------- 4
| | +---------------------- 3
| +------------------------- 2
+--------------------------------- 1
1. Time of alarm condition change, UTC
2. Local alarm number(identifier)
3. Alarm condition(A=threshold exceeded, V=not exceeded)
4. Alarm’s acknowledge state, A=acknowledged V=unacknowledged
5. Alarm’s description text
6. Checksum