Em-Trak A100 - Page 65

Technical reference
Page 63
6.8.3 ACK - Acknowledge alarm
This sentence is used to acknowledge an alarm condition reported by the transceiver.
6.8.4 AIR - AIS Interrogation request
This sentence supports ITU-R M.1371 message 15. It provides external applications with the means to initiate
requests for specific ITU-R M.1371 messages from remote AIS stations.
6.8.5 BBM -Binary broadcast message
This sentence allows generation of ITU-R M.1371 binary broadcast messages (message 8) or broadcast safety
related messages (message 14). The content of the message is defined by the application.
$--ACK,xxx,*hh<CR><LF>
Field
number
Description
1 xxx = Identification number of the alarm source to be acknowledged.
$--AIR,xxxxxxxxx,x.x,x,x.x,x,xxxxxxxxx,x.x,x*hh<CR><LF>
Field
number
Description
1 xxxxxxxxx = MMSI of interrogated station-1
2 x.x = ITU-R M.1371 message requested from station-1
3 x = Message sub-section (Reserved for future use)
4 x.x = Number of second message from station-1
5 x = Message sub-section (Reserved for future use)
6 xxxxxxxxx = MMSI of interrogated station-2
7 x.x = Number of message requested from station-2
8 x = Message sub-section (Reserved for future use)
!--BBM,x,x,x,x,x.x,s--s,x*hh<CR><LF>
Field
number
Description
1 x = Total number of sentences needed to transfer the message, 1 to 9
2 x = Sentence number, 1 to 9
3 x = Sequential message identifier, 0 to 9
4 x = AIS channel for broadcast of the radio message
5 x.x = ITU-R M.1371 message ID, 8 or 14
6 s--s = Encapsulated data
7 x = Number of fill-bits , 0 to 5