True Heading AIS-CTRX - ACK Messages

AIS-CTRX Class B AIS Transponder Manual
ACK messages
Can be generated by a minimum keypad and display (MKD) unit, chart plotter or other display device
connected to the AIS-CTRX to acknowledge an alarm condition reported by the AIS-CTRX.
$--ACK,xxx*hh <CR><LF>
• xxx = unique alarm number
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