14. AIS, DSC MESSAGE
14-7
14.11 CPA/TCPA Alarm
This alarm helps you keep your ship away from collision by warning of targets on a
collision course. The ARPA continuously monitors the predicted range at the Closest
Point of Approach (CPA) and predicted time to CPA (TCPA) of each tracked target.
When both the predicted CPA and TCPA are less than their CPA/TCPA alarm values,
the target symbol of the vessel on a possible collision course turns red, the audio
alarm sounds and the message "CPA/TCPA Alarm" appears flashing in the Status
bar.
Make sure that the gain, sea and rain controls are correctly adjusted before you use
this alarm. CPA/TCPA alarm ranges must be set correctly according to the size, ton-
nage, speed, turning performance and other characteristics of your ship.
How to set the CPA/TCPA alarm
1. Open the Home screen, then tap [Settings]→[Targets].
2. Turn on [CPA/TCPA Alarm].
3. Tap [CPA Alarm Value] to display the software keyboard. Set the value (distance)
then tap [9] to finish.
4. Set [TCPA Alarm Value] similarly.
5. Tap the close button on the title bar to finish.
How to acknowledge the CPA/TCPA alarm
The CPA/TCPA alarm generates audio and visual alerts when the CPA and TCPA of
an ARPA target are within the CPA/TCPA alarm range. The message "CPA/TCPA
Alarm" appears flashing in the Status bar. To acknowledge the alarm and stop the au-
dio alarm and the flashing message, tap "CPA/TCPA Alarm" on the Status bar.
How to deactivate the CPA/TCPA alarm
1. Open the Home screen, then tap [Settings]→[Targets].
2. Turn off [CPA/TCPA Alarm].
3. Tap the close button on the title bar to finish.
To Next Page
Loading...
Need help?
General