From a radar screen, select Options > Layers > Other Vessels > Dangerous Targets.

Collision Alarm

Turns the collision alarm off and on.

Lost Target Alarm > Range

Sets the maximum distance at which a MARPA target triggers the lost target alarm.

Lost Target Alarm > Speed

Sets the minimum observed speed at which a MARPA target triggers the lost target alarm.

Lost Target Alarm

Tuns the lost target alarm off and on.

MARPA Alarm

Turns all MARPA alarms off and on.

Range

Sets the distance at which a MARPA target triggers the collision alarm.

Time To

Adjusts the calculated time to collision at which a MARPA target triggers the collision alarm.