Why do pilots refer to the Flight Service Stations as "Radio" in the the United States? When using an aircraft radio to call a Flight Service Station ("FSS"), why do pilots refer to them as "radio?" I understand calling control towers "tower", ground control "ground", Air Route Traffic Control Centers ("ARTCC") "Center", and so on, but why "radio" for a Flight Service Station? Why isn't it "Station?"
"Radio" is just a shortened version of "Aeradio Station" which was the term used before "Flight Service Station".