Operation Manual

34 Issue 1 M-2 AIS Operation
Rx1 alarm - there has been a persistent fault with the AIS channel A receiver.
Rx2 alarm - there has been a persistent fault with the AIS channel B receiver.
DSC alarm - there has been a persistent fault with the DSC receiver.
Security event durations
Each security event covers a period of time indicated by the "duration" shown on
screen. The time at which the event started (eg when the transponder was
switched off) is given by the time and date displayed. The duration for which the
event persisted (eg for how long the transponder was switched off) is given by
the duration in hours and minutes. The time at which the event finished (eg
when the transponder was switched back on) can be determined by adding the
duration to the start time/date.