Wearable crew trackers react within 8 seconds of the man overboard incident occurring. The OLAS mobile application technology detects a break in its ‘virtual tether’ to the tag. The mobile phone(s) then sound a loud alarm, alerting crew to the fact someone is overboard. OLAS then aids the crew with the MOB recovery, clearly directing them to the GPS location where the MOB occurred with clear visual signals and bearing data.