ACR Electronics Y1-03-0222, AIS-300 manual AIS alarm messages Nmea 0183 ALR, Text, ACK messages

8.AIS alarm messages (NMEA 0183 ALR, Text)

Local alarm condition and status. This sentence is used to report an alarm condition on a device and its current state of acknowledgement.

ALR message format

!-- ALR,hhmmss.ss,xxx,A,A,c--c*hh<CR><LF> field 1 2 3 4 5

	Field		Format	Description
1		x		hhmmss.ss = Time of alarm (UTC)
2				Unique alarm number
3				Alarm condition
4				Alarm acknowledge state
5				Alarm description, text
				Alarm 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

9.ACK messages

An Acknowledge Message (ACK) can be generated by a minimum keypad and display (MKD) unit, chart plotter or other display device connected to the Nauticast™-B to acknowledge an alarm condition reported by the Nauticast™-B.

ACK message format

!-- ACK,xxx*hh <CR><LF> field 1

	Field		Format	Description
1		x		unique alarm number

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Y1-03-0222 Rev. C