Since PLBs are not specifically aviation-related, AFRCC contacts the appropriate local SAR lead agency based on the lat/long location and respective individual agreements with the states.
It was nearly dark when the AFRCC contacted the Idaho State Division of Aeronautics, too late to dispatch SAR aircraft either owned by the state or operated by the Civil Air Patrol, so the nearest county sheriff was contacted.
Air Force Rescue Coordination Center (AFRCC) receives its signal via the satellite-based COSPAS/SARSAT network.
The AFRCC is the United States' inland search-and-rescue coordinator, the single agency responsible for coordinating on-land federal SAR activities in the 48 contiguous states, Mexico and Canada.
When a distress call is received, AFRCC first tries to verify that it's legitimate.