Ops Never Stops: GCA secures in-flight transitions Published Nov. 13, 2020 By Airman 1st Class John R. Wright 86th Airlift Wing/Public Affairs RAMSTEIN AIR BASE, Germany -- Air traffic controllers at 86th Operations Support Squadron ground controlled approach secure safe departures and landings at Ramstein Air Base, Germany, by guiding airborne aircraft until they transition to or from German air traffic controllers.GCA is the counterpart to the Tower, collectively making up Air Traffic Control.