Samyung ENC SI-30A, Manual Instruction

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6-3 Message structures
Message structures are shown in the format used in IEC 61162-1
6-3-1 ABK - AIS addressed and binary broadcast acknowledgement
The ABK sentence is output by the transponder on the presentation ports in response to the
receipt of an ABM, AIR or BBM sentence. Its purpose is to inform the requesting device
about the success or failure of its request.
$--ABK ,xxxxxxxxx ,x ,x.x ,x ,x *hh<CR><LF>
① ② ③ ④ ⑤
①. MMSI of the addressed AIS unit ② AIS channel of reception
③ M.1371 Message ID ④ Message sequence number
⑤ Type of acknowledgement
6-3-2 ABM – AIS addressed binary and safety related message
This sentence is used to transmit M.1371 messages 6 (binary addressed) or 12 (addressed
safety related) via the AIS system by encapsulating the M.1371 message within one or more
AIS sentences.
$--ABM ,x ,x ,x ,xxxxxxxxx ,x ,xx ,s—s ,x *hh<CR><LF>
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
① total number of sentences ② sentence number
③ sequential message identifier ④ MMSI of the destination AIS unit
⑤ AIS channel ⑥ M.1371 Message ID (6 or 12)
⑦ encapsulated data ⑧ number of fill-bits
When the transponder receives an ABM sentence from an external device, it will return an
ABK sentence to indicate the success or failure of the transmission attempt.
6-3-3 ACA – AIS channel assignment message
$--ACA ,x ,llll.ll,a ,yyyyy.yy,a ,llll.ll,a ,yyyyy.yy,a ,x ,xxxx ,x ,xxxx ,x ,x ,x ,a ,x ,hhmmss.ss *hh<CR><LF>
① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ ⑫ ⑬ ⑭ ⑮
① sequence number ② region northeast corner latitude, N/S
③ region northeast corner longitude, E/W ④ region southwest corner latitude, N/S
⑤ region southwest corner longitude, E/W ⑥ transition zone size
⑦ channel A ⑧ channel A bandwidth
⑨ channel B ⑩ channel B bandwidth
⑪ Tx/Rx mode control ⑫ power level control
⑬ information source ⑭ in-use Flag