Specifications

APPENDIX
AP-22
Output
ABK - UAIS addressed and binary broadcast acknowledgement
The ABK-sentence is generated when a transaction, initiated by reception of an ABM, AIR
or BBM sentence, is completed or terminated.
$--ABK,xxxxxxxxx,a,x.x,x,x*hh<CR><LF>
| | | | | |
| | | | | +--- 6
| | | | +----- 5
| | | +------- 4
| | +---------- 3
| +------------- 2
+------------------- 1
1. MMSI of the addressed AIS unit
2. AIS channel of reception
3. Message type
4. Message sequence number
5. Type of acknowledgement
6. Checksum
ACA- See “Input” section.
ALR –Set alarm state
$--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
LRF – Long-range function
See input section.