
78
A.3
Supported IEC 61162 Data Sentences
Data Port
Input Sentences
Output Sentences
Sensor 1
Sensor 2
Sensor 3
DTM, GNS, RMC, VBW, HDT, HDG,
ROT, GBS, GLL, VTG, THS, GSA,
GGA, OSD, VHW
N/A
DGPS
DTM, GNS, RMC, VBW, HDT, HDG,
ROT, GBS, GLL, VTG, THS, GSA,
GGA, OSD, VHW
N/A
External Display
ABM, ACA, ACK, AIR, BBM, SSD,
VSD, AIQ, LRI, LRF, SPW, EPV
ABK, ACA, VDM, VDO,
TXT, ALR, LRF, LR1,
LR2, LR3, EPV
Pilot
ABM, ACA, ACK, AIR, BBM, SSD,
VSD, AIQ, LRI, LRF, SPW, EPV
ABK, ACA, VDM, VDO,
TXT, ALR, LRF, LR1,
LR2, LR3, EPV
Long Range
LRI, LRF
LRF, LR1, LR2, LR3
A.4
Transmission Interval
Sentence
Interval
VDO
Once a second
ALR (active)
Once every thirty seconds
ALR (inactive)
Once every sixty seconds
79
A.5
Interpretation of Input Sentences
A.5.1
ABM – AIS Addressed Binary and Safety Related Message
This sentence supports ITU-R M.1371 Messages 6, 12, 25, 26 and provides an external
application with a means to exchange data via an AIS transponder.
A.5.2
ACA – AIS Channel Assignment Message
An AIS device can receive regional channel management information.
$--
ACA,x,llll.ll,a,yyyyy.yy,a,llll.ll,a,yyyyy.yy,a,x,xxxx,x,xxxx,x,x,x,a,x,hhmmss.s
s*hh<CR><LF>
Field No.
Format
Description
Remark
1
x
Sequence Number
2
llll.ll,a
Region northeast corner latitude – N/S
3
yyyyy.yy,a Region northeast corner longitude – E/W
4
llll.ll,a
Region southwest corner latitude – N/S
5
yyyyy.yy,a Region southwest corner longitude – E/W
6
x
Transition zone size
7
xxxx
Channel A
8
x
Channel A bandwidth
9
xxxx
Channel B
10
x
Channel B bandwidth
11
x
Tx/Rx mode control
12
x
Power level control
13
a
Information source
14
x
In-use flag
15
hhmmss.s
s
Time of “in use”
change
!--ABM,x,x,x,xxxxxxxxx,x,xx,s—s,x*hh<CR><LF>
Field No. Format Description
Remark
1
x
Total number of sentences needed to transfer the
message
2
x
Sentence number
3
x
Sequential message identifier
4
xxxxxxxx
x
The MMSI of the destination AIS unit for the ITU-R
M.1371 message
5
x
AIS channel for broadcast of the radio message
6
xx
ITU-R M.1371 message ID
7
s—s
Encapsulated data
8
x
Number of fill-bits