Gütersloh, early 80s. Those were the days. I enjoyed the satisfaction of seeing the F4 exhaust nozzles open up and the reheat ignite as the crew finally figured out where you'd got to.
And there was also the amusement of getting back into the circuit, shortly to be joined by intrepid air defender, then the calls on Guard of "F4 in Gütersloh zone, please call on UHF" and "Sorry, I'll phone after landing."