Technical reference
Page 67
6.9.2 ACA - AIS Channel assignment message
See section 6.8.2.
6.9.3 ALR - Set alarm state
This sentence is used to indicate local alarm conditions and status along with alarm acknowledgement status.
6.9.4 LRF - AIS long range function
See section 6.8.12.
6.9.5 LR1 - Long range reply with destination for function request ‘A’
The LR1 sentence identifies the destination for the reply and contains information requested by the ‘A’ function
character.
6.9.6 LR2 - Long range reply for function requests ‘B’, ‘C’, ‘E’ and ‘F’
The LR2 sentence contains the information requested by the B, C, E and F function characters.
$--ALR,hhmmss.ss,xxx,A, A,c--c*hh<CR><LF>
Field
number
Description
1 hhmmss.ss Time of alarm condition change, UTC
2 xxx Local alarm number (identifier)
3 A Alarm condition (A = threshold exceeded, V = not exceeded)
4 A
Alarm's acknowledge state, A = acknowledged , V = unacknowledged
5 c--c Alarm's description text
$--LR1,x,xxxxxxxxx,xxxxxxxxx,c--c,c--c,xxxxxxxxx*hh<CR><LF>
Field
number
Description
1 x Sequence Number, 0 to 9
2 xxxxxxxxx MMSI of responder
3 xxxxxxxxx MMSI of requestor (reply destination)
4 c--c
Ship's name, 1 to 20 characters
5 c--c Call Sign, 1 to 7 characters
6 xxxxxxxxx IMO Number, 9-digit number
$--LR2,x,xxxxxxxxx,xxxxxxxx,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x.x,T,x.x,N*hh<CR><LF>
Field
number
Description
1 x Sequence Number, 0 to 9
2 xxxxxxxxx MMSI of responder
3 xxxxxxxxx Date: ddmmyyyy, 8 digits
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