Seatex AIS 100 Instruction Manual, rev. 5
External interfaces
52
Message ID is a general broadcast (ITU-R M.1371 messages 8 or 14),
this field is null.
NOTE
2
Indication of VDL channel upon which Message ID 7 or 13
acknowledgement was received. An "A" indicates reception on
channel A. A "B" indicates reception on channel B. If not available,
field is null.
NOTE 3
This indicates to the external application the type of ITU-R M.1371
message that this ABK sentence is addressing. Also see the message
IDs listed in NOTE 4.
NOTE 4
The message sequence number, together with the ITU-R M.1371
message ID and MMSI of the addressed AIS unit, uniquely identifies
a previously received ABM, AIR, or BBM sentence. Generation of an
ABK-sentence makes a sequential message identifier available for
reuse. The ITU-R M.1371 Message ID is used to determine the origin
of the message sequence identifier number. The following table lists
the origins by message ID:
ITU-R M.1371
Message ID
Message Sequence Number source
6
sequential message identifier from ABM-
sentence, IEC 61162-1
7
addressed AIS unit's message 7, sequence
number, ITU-R M.1371
8
sequential message identifier from BBM-
sentence, IEC 61162-1
12
sequential message identifier from ABM-
sentence, IEC 61162-1
13
addressed AIS unit's message 13, sequence
number, ITU-R M.1371
14
sequential message identifier from BBM-
sentence, IEC 61162-1
15
no source, field shall be null
NOTE 5
Acknowledgements provided are:
0
= message (6 or 12) successfully received by the addressed
AIS unit,
1
= message (6 or 12) was broadcast, but no
acknowledgement by the distant addressed AIS unit,
3
= message could not be broadcast,
4
= requested broadcast of message (8, 14, or 15) has been
successfully completed, late reception of a message 7 or 13
acknowledgement "addressed to own-ship" MMSI –
identified by; destination MMSI, acknowledgement source
MMSI, message sequence identifier, and message type.
Late reception means that the AIS unit did not have an
Summary of Contents for Seatex AIS 100
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Page 110: ...Seatex AIS 100 Instruction Manual rev 5 Appendix B Declaration of conformity 102 Blank page...
