Konsberg AIS 200, Руководство по установке

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Kongsberg AIS 200 Installation Manual, rev. 2 Appendix B - Digital interface IEC 61162-1
NOTE 2 The Sequential Message Identifier provides a message identification number from
0 to 9 that is sequentially assigned as needed. Note that this is only a sequential
message identifier. This is used differently than the "Message sequence identifier"
of an ABM sentence. This identifier is incremented for each new multi-sentence
message. The count resets to 0, after 9 is used. For the contents of a message 8 or
14 requiring multiple sentences, each sentence of the message contains the same
Sequential Message Identification number. This number is used to link the
separate sentences containing portions of the same encapsulated data. This allows
for the possibility that other sentences might be interleaved with the message
sentences that, taken collectively, contain a single message 8 or 14. This number
NOTE 3
l B, 3 =
n
channel B.
NOTE 4 or
e may
sentences may contain
rst
ber of "6-bit" symbols in a sentence must
djusted so that the total number of characters in a sentence does not exceed
NOTE 5
multiple of six. If it is not,
es the number of bits that
were added to the last 6-bit coded character. This value shall be set to zero when
10.3.6 Interrogation
The pair of interrogation sentences, a LRI-sentence followed by a LRF-sentence, provides the
information
the reply
entences (LRF, LR1, LR2, and LR3). The LRI-sentence contains the information that the
IS needs in order to determine if the reply sentences need to be constructed. The LRF-
in the reply sentences .
also links a future ABK-sentence acknowledgement to the appropriate BBM-
sentence. (See ABK, NOTE 4.)
The AIS channel that shall be used for the broadcast: 0 = no broadcast channel
preference, 1 = Broadcast on AIS channel A, 2 = Broadcast on AIS channe
Broadcast two copies of the message – one on channel A and another sent o
This is the content of the "binary data" parameter for ITU-R M.1371 message 8
the "Safety related Text" parameter for message 14. The first sentenc
contain up to 58 "6-bit" symbols (348 bits). The following
up to 60 "6-bit" symbols (360 bits), if fields 4 and 5 are unchanged from the fi
sentence and set to null. The actual num
be a
the "82-character" limit.
To encapsulate, the number of binary bits must be a
one to five "fill bits" are added. This parameter indicat
no "fill bits" have been added. This cannot be a null field.
LRI – Long-Range
The long-range interrogation of the AIS is accomplished through the use of two sentences.
needed by an AIS to determine if it must construct and provide
s
A
sentence identifies the information that needs to be
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