ACR OLAS Exposure Series Tag - 4 PackOLAS Exposure Series Tag 4 Pack The EXPOSURE OLAS Tag is a Wearable Crew Tracker that integrates OLAS (Overboard Location Alert System) technology. The OLAS mobile application technology detects a break in its virtual tether to the tag within 8 seconds of a tag going missing. The mobile phone(s) then sounds an alarm and records the latitude and longitude of the incident using the phone or tablets GPS. OLAS then aids the crew with the MOB recovery,