Are you sure that isn't, "callsign Charlie?" I loved that scene. When this movie came out, I was Active Duty USAF, working on a tactical nuclear weapons system at the time. We were proudly serving our Nation and ending the Cold War. We all had top-line stereo systems back then, and we'd crank the opening flight deck scene of this movie into 3-way speakers with either 12 or 15-in woofers. Great times in foreign country dorm-like rooms for us single guys in their 20's. We USAF comm-electronics ground pukes were rather jealous of fighter pilots at that time.