APPENDICES Page
60
Document id: 7000 108-011 A2
MMSI of Destination
Used
AIS Channel
Used
Message Id
Used if 6 or 12, otherwise the sentence is
ignored
Encapsulated Data
Used
Number of filled bits
Used
ACA - AIS Regional Channel Assignment Message
The zone created of this sentence must be accepted by the channel
management rules (size of zone, distance to own position, valid
channel number etc). If the zone isn’t accepted, the zone will be
ignored
Field Comment
Sequence Number
Ignored
NE Latitude (2 fields)
Used
NE Longitude (2 fields)
Used
SW Latitude (2 fields)
Used
SW Longitude (2 fields)
Used
Transitional Zone Size
Used
Channel A
Used
Channel A Bandwidth
Used
Channel B
Used
Channel B Bandwidth
Used
Tx/Rx Mode
Used
Power Level
Used
In Use Flag
Ignored
Time of In Use Change
Ignored
ACK - Acknowledge Alarm
Field Comment
ID of the alarm source
Used
AIQ - Query Sentence
Field Comment
Approved sentence formatter of
data being requested
It’s possible to query the following sentences:
ACA, ALR, LRI, SSD, TXT and VSD
AIR - AIS Interrogation Request
This sentence can also be used to do a “UTC Request”. It’s always
sent on both Channel A and Channel B (due to that this is a
multiple addressed sentence).
Field Comment
MMSI 1
Used
Message Id 1.1
Used
