Two C-17s were fitted with the Lightweight Airborne Radio System (LARS), a radio to locate and recover personnel in denied territory, during SpaceX’s manned mission to the International Space Station.
The radio helps the C-17 crew to pick up the survival beacon in event of an abort over the oceans.
Besides the radio, each C-17 carries rescue equipment and a medically trained pararescuemen team.
There was one C-17 stationed in Hawaii and the other in South Carolina.