4. AIS OPERATION
4-26
4.16
AIS System Messages
AIS system messages are displayed at the bottom right corner of the screen.
The table below shows the AIS system messages and their meanings.
AIS system messages
Message Meaning
AIS COLLISION
CPA and TCPA of an activated AIS target are
below value set on the menu.
AIS NEW TARGET
AIS target has entered an acquisition zone.
AIS LOST
Lost target. An activated target is declared a
lost target when it fails to produce data for six
minutes or five reporting intervals, whichever
is the shorter.
AIS TARGET 95%
Appears when capacity for AIS targets is 95%
full.
AIS TARGET FULL
The radar only displays the closest 1000 AIS
targets from own ship.
ASSOCIATION
Tracked target merged with AIS target. The
indication disappears when the target no
longer meets the criteria set in section 4.12.
When the message "RECEIVE" is displayed,
ASSOCIATION is not displayed.
NO CPA/TCPA FOR AIS
CPA/TCPA cannot be calculated. Further the
CPA/TCPA value in the basic data display is
marked with an asterisk to indicate that it is
not reliable.
RECEIVE
Not receiving AIS data from own AIS (VDO
message).
TRANSMIT ERROR
Could not send AIS message.
WT
Water tracking speed in use.
