Guard Zone Alarms - Raymarine LIGHTHOUSE 3 Advanced Operation Instructions

12.9 Dangerous targets alarm
You can use the Dangerous targets alarm to notify you if a Radar or AIS target will reach a specified
distance from your vessel within a specified time.
To set up the Dangerous target alarm, first adjust the Safe distance to the desired value and then
select a Time to reach safe distance. The alarm will be triggered if a tracked target will reach the
specified Safe distance from your vessel within the time period selected.
You can choose whether you want the Dangerous target alarm to trigger for Radar and / or AIS
targets.
You can display a Safe distance ring around your vessel in the Radar app using the Show safe
distance control.

12.10 Guard zone alarms

Guard zones alert you if a Radar return is detected within the Guard zone area.
2 Guard zones can be configured for each connected Radar scanner.
The Guard zones can be configured from the Alarms menu: Menu > Alarms > Guard zone 1 or
Menu > Alarms > Guard zone 2
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