The SARMaster searh and rescue information system is being used to process Personal locator Beacon (PLB) alerts. When a PLB is set off, SARMaster can detect the location of the alert within a kilometer. For GPS-equipped PLBs, the SARMaster software can narrow the location to within 500 meters. The Air Force Rescue Coordination Center (AFRCC) at Langley Air Force Base, already a user of the EMS Technologies SARMaster when it receives distress alerts in its national center, has contracted with EMS to deploy SARMaster at the state level to support local rescue activities.