Transas Class B - AIS Alarm Messages (NMEA 0183 ALR, Text); ALR Message Format

LD2103 V3.0 Page 19 of 33
SRT Marine
Instruction Manual
SRT-MTB
©
Class B Marine AIS
•
x3 = Channel A bandwidth
•
x4x4x4x4 = Channel B
•
x5 = Channel B bandwidth
•
x6 = Tx/Rx mode control
•
x7 = Power level control
•
a3 = Information source
•
x8 = In-Use Flag
•
hhmmss.ss = Time of "in-use" change
Channel management information source messages (NMEA 0183 ACS)
This sentence is used in conjunction with the ACA sentence and identifies the originator of an ACA message.
ACS Message Format
$--ACS,x,xxxxxxxxx, hhmmss.ss,xx,xx,xxxx*hh <CR><LF>
•
x = Sequence Number , 0 to 9
•
xxxxxxxxx =MMSI of originator
•
hhmmss.ss = UTC of receipt of channel management information
•
xx = UTC Day, 01 -31
•
xx = UTC Month, 01 -12
•
xxxx = UTC Year
AIS Alarm Messages (NMEA 0183 ALR, Text)
ALR message format
$--ALR,hhmmss.ss,xxx,A,A,c--c*hh<CR><LF>
Where
•
hhmmss.ss = Time of alarm (UTC)
•
xxx = Unique alarm number
•
A = Alarm condition
•
A = Alarm acknowledge state
•
c--c = alarm description, text
Alarms descriptions presented are:
•
AIS: TX malfunction
•
AIS: Antenna VSWR exceeds limit
•
AIS: Rx channel 1 malfunction
•
AIS: Rx channel 2 malfunction
•
AIS: general failure
•
AIS: no sensor position in use
•
AIS: no valid SOG information
•
AIS: no valid COG information