Operation Manual

M-2 AIS Operation Issue 1 33
Alarm mode: Security log
This page lists the events stored in the security log. The security log stores any
event which results in the AIS transmitter being disabled for more than 15
minutes. The events in this log are retained permanently and are only deleted
when the log has reached its maximum size of 30 events.
Security event codes
Each security event is preceded by a 4-character ID code. The first character is
always an 'S' for security events, and the second character is always '-' to
indicate that acknowledgement is not required. The two numeric digits are an
index value indicating the relative position in the log of each entry.
Security event types
Tx silent - this indicates that the transponder has been placed into a silent mode
as a result of being in a location where regional channel management has
specified that the transponder should not transmit.
Tx quiet - this indicates that the transmitter has been disabled as a result of an
operator command. This is a special function that is not available on all units.
Power off - this indicates that the M-2 transponder was switched off.
Tx alarm - there has been a persistent fault with the transmitter.
VSWR alm - there has been a persistent fault with the antenna. This has not
stopped the transponder from transmitting, but performance may have
been impaired
Select
voyage mode
View current
alarms page
View combined list
of all alarm and
security events
Time of event
Security event code
Security event type
Event duration
Event date