APPENDIX 3 ALERT CODES, MESSAGES AND MEANINGS
AP-14
ALR format alerts
The following critical alerts cannot be acknowledged from external equipment and must be ac-
knowledged from the radar itself.
• TT COLLISION
• AIS COLLISION
Alert
code
Alert title
Priority &
Category
Explanation
522 TT TARGET 95%(AUTO) Caution
Cat: A
Automatically acquired target capacity has
reached 95%.
Remedy: Press the ALERT ACK key. Remove TT symbols manually.
523 TT TARGET FULL(AUTO) Warning
Cat: A
Automatically acquired target capacity has
reached 100%.
Remedy: Press the ALERT ACK key. Remove TT symbols manually.
524 TT TARGET 95% (MAN) Caution
Cat: A
Manually acquired target capacity has reached
95%.
Remedy: Press the ALERT ACK key. Remove TT symbols manually.
525 TT TARGET FULL(MAN) Warning
Cat: A
Manually acquired target capacity has reached
100%.
Remedy: Press the ALERT ACK key. Remove TT symbols manually.
530 AIS DISPLAY 95% Caution
Cat: A
AIS display capacity has reached 95% (285 tar-
gets).
Remedy: Press the ALERT ACK key. Adjust [AIS DISP FILTER] settings to decrease the number of
targets displayed.
531 AIS DISPLAY FULL Warning
Cat: A
AIS display capacity has reached 100% (300 tar-
gets).
Remedy: Press the ALERT ACK key. Adjust [AIS DISP FILTER] settings to decrease the number of
targets displayed.
533 AIS CAPACITY FULL Caution
Cat: A
AIS capacity has reached 100% (1000 targets).
Remedy: Press the ALERT ACK key. Adjust [AIS DISP FILTER] settings to decrease the number of
targets displayed.
534 AIS ACTIVATE 95% Caution
Cat: A
Active AIS target capacity has reached 95% (38
targets).
Remedy: Press the ALERT ACK key. Adjust [AIS DISP FILTER] settings to decrease the number of
targets displayed.
535 AIS ACTIVATE FULL Warning
Cat: A
Active AIS target capacity has reached 100% (40
targets).
Remedy: Press the ALERT ACK key. Adjust [AIS DISP FILTER] settings to decrease the number of
targets displayed.
526 TT COLLISION Alarm
Cat: A
TT is within CPA/TCPA threshold, danger of colli-
sion.
Remedy: Press the ALERT ACK key. Take evasive action if necessary. Adjust CPA/TCPA settings.
536 AIS COLLISION Alarm
Cat: A
AIS target is within CPA/TCPA threshold, danger
of collision.
Remedy: Press the ALERT ACK key. Take evasive action if necessary. Adjust CPA/TCPA settings.
521 TT NEW TARGET Warning
Cat: A
A new TT target has entered the Acquisition Zone.
Remedy: Press the ALERT ACK
key. Confirm location of new target.
529 AIS NEW TARGET Warning
Cat: A
A new AIS target has entered the Acquisition
Zone.
Remedy: Press the ALERT ACK key. Confirm location of new target.