work when GPS data for your vessel is not available.
CPA Alarm
A CPA alarm is triggered when a target meets the criteria you have
established. When a CPA alarm occurs, the target that caused the
alarm is displayed. Press the
Mute
button to silence the alarm. No
further alarms will be triggered for this target. However, if you wish
to re-enable CPA alarms for this target again, press the
Alarm
button. Naturally, if the target is still within the parameters
established for triggering a CPA alarm, the alarm will immediately
sound again for that target!
Note
: The
Mute
and
Alarm
button is found on the CPA Graphical
Display Screen whenever a target is converging.
There are several settings that control when a target triggers a CPA
alarm:
CPA alarm
The distance (in nautical miles) which causes a CPA
alarm to be triggered. If a target has a CPA of this
value, or less, an alarm will be triggered for that
target unless the alarm is suppressed by any of the
other settings described below.
This allows you to generate an alarm for any target
that is predicted to come “too close”.
CPA alarm –
time
The time (in minutes) of when the CPA will occur.
If the CPA time is greater than this value then no
CPA alarm will be triggered for this target.
This allows you to suppress alarms for targets which
are predicted to come close but not for a long period
of time.
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