Lost SART / MOB / EPIRB targets
When an AIS SART (Search and Rescue Transponder) / MOB (Man Over Board) / EPIRB (Emergency Position Indicating Radio Beacon) target becomes lost it remains onscreen and triggers an alarm notification.
AISLost SARTLost MOBLost EPIRB

From the Lost target notification you can:
select Place Waypoint to place a new waypoint at the last known position of the target.
select Clear lost target to remove the target from the system.
select OK to dismiss the alarm and keep the target onscreen. The target can be cancelled or a waypoint can be placed from the context menu.