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5. AIS Operation
5-26
5.17 AIS Alerts
AIS alerts are displayed at the bottom right corner of the screen. The table below shows the AIS alerts and their
meanings.
AIS alerts
Message no. Message Alert category Description
632 AIS dangerous
target
Alarm AIS target has met dangerous target limit set by
CPA and TCPA.
633 AIS lost target Warming No update information received from tracked AIS
target within defined reporting interval of ship
type.
634 AIS message
received
Warming AIS message received.
635 AIS target in
ACQ ZONE
Warming AIS target has entered an acquisition zone. The
target's symbol is red and flashing.
636 AIS display 95%
full
Warming When 95% of display capacity for AIS targets is
reached.
637 AIS display 100%
full
Warming When 100% of display capacity for AIS targets is
reached.
638 AIS storage 95%
full
Warming When 95% of storage capacity for AIS targets is
reached.
639 AIS storage 100%
full
Alarm When 100% of storage capacity for AIS targets is
reached.
737 AIS receive error Warming Not receiving AIS data from own AIS (VDO
message).