AIS dangerous targets
If AIS targets enter a dangerous target state they can trigger an alarm on your display. AIS targets are considered to be dangerous if they will pass within a specified safe distance from your vessel within a specified time interval.
AlarmsDangerous AIS targetDangerous AIS targetThe dangerous target alarm can be enabled and disabled from the alarms menu: .

The dangerous target alarm can be configured from the Dangerous target page, accessed from the alarms menu:
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To set up the AIS dangerous target alarm, first adjust the Safe distanceSafe 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 display a Safe distance ring around your vessel in the Chart app and Radar app by enabling Show safe distance.