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NMEA 0183 Messages
ACS Message Format
This sentence is used in conjunction with the ACA sentence and identifies the originator of an ACA
message.
$--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
ALR Message Format
Alarm message
$--ALR,hhmmss.ss,xxx,A,A,c--c*hh<CR><LF>
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
AIS: 12V alarm
AIS: 5V alarm
AIS: Loss of serial interface integrity
AIS: Background noise above -77dBm
ACK Message Format
Can be generated by a minimum keypad and display (MKD) unit, chart plotter or other display
device connected to the HIS-70R to acknowledge an alarm condition reported by the SAS SERIES.
$--ACK,xxx*hh <CR><LF>
xxx = Unique alarm number