Furuno TZT12F Operator's Manual page 9

CPA/TCPA alarm
The CPA/TCPA alarm releases an aural alarm and a visual alarm (message in Status bar) when both the CPA
and TCPA of a tracked target are equal to or lower than the CPA/TCPA alarm setting.
CPA: Closest point of approach
TCPA: Time to closest point of approach
How to set the CPA/TCPA alarm How to set the CPA/TCPA alarm
Home screen H H
OR
How to acknowledge the CPA/TCPA alarm How to acknowledge the CPA/TCPA alarm
Tap the alarm message (top of screen) to acknowledge the alarm and stop the aural alarm.
CPA Line
The CPA Line feature gives you a visual line that depicts the closest point of approach to a selected ARPA target. To
use this feature, own ship position and heading data is required.
How to enable the CPA Line feature
H H Home screen
How to show the CPA Line
CPA/TCPA Alarm
CPA Line
ARPA target
Own ship
Set the alarm value, then tap [ ].
Tap
CPA Graphic Display
Tap
5
9 9
ON