Filter
Top Products
APPENDIX 4 DIGITAL INTERFACE
AP-16
ALR-Set alarm state
TXT-Text transmission
VDM-AIS VHF data-link message
VDO-AIS VHF data-link own vessel report
$--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
$--TXT,xx,xx,xx,c--c*hh<CR><LF>
| | | | | |
| | | | | +--- 5
| | | +--+----- 4
| | +---------- 3
| +------------- 2
+---------------- 1
1. Total number of message, 01 to 99
2. Message number, 01 to 99
3. Text identifier
4. Text Message
5. Checksum
!--VDM,x,x,x,a,s--s,x*hh<CR><LF>
| | | | | | |
| | | | | | +--- 7
| | | | | +----- 6
| | | | +-------- 5
| | | +------------ 4
| | +-------------- 3
| +---------------- 2
+------------------ 1
1. Total number of sentences needed to transfer the message, 1 to 9
2. Message sentence number, 1 to 9
3. Sequential message identifier, 0 to 9
4. AIS channel
5. Encapsulated ITU-R M.1371 radio message
6. Number of fill-bits, 0 to 5
7. Checksum
!--VDO,x,x,x,a,s--s,x*hh<CR><LF>
| | | | | | |
| | | | | | +--- 7
| | | | | +----- 6
| | | | +-------- 5
| | | +------------ 4
| | +-------------- 3
| +---------------- 2
+------------------ 1
1. Total number of sentences needed to transfer the message, 1 to 9
2. Message sentence number, 1 to 9
3. Sequential message identifier, 0 to 9
4. AIS channel
5. Encapsulated ITU-R M.1371 radio message
6. Number of fill-bits, 0 to 5
7. Checksum