Operation Manual

M-2 AIS Operation Issue 1 31
An inactivated alarm is an alarm which has cleared at the time indicated. This is
the second entry for a particular alarm – the times when it occurred and when it
cleared are recorded separately. The ‘V’ indicates that the record refers to the
time when the alarm cleared.
The second character indicates whether the alarm has been acknowledged or
not - 'A' indicates that it has been acknowledged and 'V' that it has not.
The two numeric digits are a unique code for each alarm type.
Log entry codes
Log entry codes are of two types – Security and Text. Neither event requires
acknowledgment.
Security codes are explained in the Security Log section.
Text codes denote entries in the log which may be used for fault determination
and servicing. Each text entry is preceded by a 4-character ID code. The first
character is always an 'T' for text entries, and the second character is always '-'
to indicate that acknowledgement is not required. The two numeric digits are a
unique identifier in accordance with AIS specifications.
Alarm mode: Current alarms
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voyage mode
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events log
Time of alarm
Alarm code
Alarm description