4. TT OPERATION
4-9
4.11 CPA/TCPA Alarm
Set CPA (Closest Point of Approach) alarm range and TCPA (predicted Time to CPA)
alarm time to alert you when targets are on a collision course. When CPA and TCPA
of any TT become less than the preset CPA and TCPA alarm settings, the audio alarm
sounds. The alarm message "COLLISION" appears. The target symbol changes to a
dangerous target symbol (triangle) and flashes with its vector. You can stop the audio
alarm with any key. The flashing of the triangle stops when the tracked TT is not in the
CPA and TCPA alarm setting. The TT continuously monitors CPA and TCPA of all TT.
This feature helps identify targets which are on a collision course. Correctly adjust the
gain, sea clutter and rain clutter.
1. Press the MENU key to open the menu.
2. Select [Target], then press the ENTER key.
3. Select [CPA], then press the ENTER key.
4. Set the CPA distance, then press the ENTER key.
5. Select [TCPA], then press the ENTER key.
6. Set the TCPA time, then press the ENTER key.
7. Press the MENU key to close the menu.
Do not depend on the CPA/TCPA alarm as
the only method to detect the risk of colli-
sion. The navigator is not released of the re-
sponsibility to keep visual caution for
collision situations, whether or not the ra-
dar or other plotting aid is in use.
Target before
alart generation
(flashing)
Target after
generation
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