JRC JHS-183 - Page 115

8-5
(2.1.5) ACK – Acknowledge alarm
$--ACK, xxx*hh<CR><LF>
Unique alarm number at alarm source
(2.1.6) ALR – Set alarm state
$--ALR,hhmmss.ss,xxx,A,A,c--c*hh<CR><LF>
Alarm’s description text
Alarm’s acknowledge state, A = acknowledged
V = unacknowledged
Alarm condition (A = threshold exceeded, V = not exceeded)
Unique alarm number (identifier) at alarm source
Time of alarm condition change, UTC
(2.1.7) AIR – AIS Interrogation Request
Message sub-section (Reserved for future use)
Number of message requested from station-2
MMSI of interrogated station-2
$--AIR,xxxxxxxxx,x.x,x,x.x,x,xxxxxxxxx,x.x,x*hh<CR><LF>
Message sub-section (Reserved for future use)
Number of second message from station-1
Message sub-section (Reserved for future use)
ITU-R M.1371 message requested from station-1
MMSI of interrogated station-1
(2.1.8) BBM – Broadcast Binary Message
!--BBM,x,x,x,x,x.x,s--s,x*hh<CR><LF>
Number of fill-bits, 0 to 5
Encapsulated data
ITU-R M.1371 message ID, 8 or 14
AIS channel for broadcast of the radio message
Sequential message identifier, 0 to 9
Sentence number, 1 to 9
Total number of sentences needed to transfer the message, 1 to 9
(2.1.9) DSC – Digital selective calling information
$ --DSC,xx,xxxxxxxxxx,xx,xx,xx,x.x,x.x,xxxxxxxxxx,xx,a,a*hh<CR><LF>
Expansion indicator
Acknowledgement
Nature of distress
MMSI of ship in distress
Time or Tel. No.
Position or Channel/frequency
Type of communication or second telecommand
Nature of distress or first telecommand
Category
Address
Format specifier