Saab R5 - ABK AIS Acknowledgement Sentence; ACA AIS Regional Channel Assignment Message; ALR Set Alarm State Sentence

R5 SOLID AIS System
INTERPRETATION OF OUTPUT SENTENCES
7000 118-200, C2 Page 76
9.3 AIS Output Sentences
9.3.1 ABK – AIS Addressed and binary broadcast acknowledgement
$ -- ABK,xxxxxxxxx,x,x.x,x,x
Output rate: On event.
Field
Format
Name
Comment
1
--ABK
Sentence Id
Used
2
xxxxxxxxx
MMSI of the addressed AIS
unit
Used
3
x
AIS channel of reception
Used
4
x.x
ITU - R M.1371 Message ID
Used
5
x
Message sequence number
Used
6
x
Type of acknowledgement
Used
9.3.2 ACA – AIS Regional Channel Assignment Message
$--ACA,x,llll.ll,a,yyyy.yy,a,llll.ll,a,yyyy.yy,a,x,xxxx,x,xxxx,x,x,x,a,x,
hhmmss.ss
Output rate: On event. On request.
Field
Format
Name
Comment
1
--ACA
Sentence Id
Used
2
x
Sequence number
Ignored
3
llll.ll
NE latitude (2 fields)
Used
4
a
5
yyyy.yy
NE longitude (2 fields)
Used
6
a
7
llll.ll
SW latitude (2 fields)
Used
8
a
9
yyyy.yy
SW longitude (2 fields)
Used
10
a
11
x
Transitional zone size
Used
12
xxxx
Channel A
Used
13
x
Channel A bandwidth
Used
14
xxxx
Channel B
Used
15
x
Channel B bandwidth
Used
16
x
Tx/Rx mode
Used
17
x
Power level
Used
18
a
Information source
Ignored
19
x
In use flag
Ignored
20
hhmmss.
ss
Time of In use change
Ignored
9.3.3 ALR – Set alarm state
$--ALR,hhmmss.ss,xxx,A, A,c--c
Output rate: On event, on request, and automatically. Output every
30s for active alarms and every 60s when no active alarms.
Field
Format
Name
Comment
1
--ALR
Sentence Id
Used
2
hhmmss.ss
Time of alarm condition
change, UTC
Used
3
Xxx
Unique alarm number
(identifier) at alarm
source
Used
4
A
Alarm condition
A = threshold exceeded
Used