Airspace;
In addition to communicating with the local air traffic control facility, aircraft are required to give the Iranian Air Defense Radar a ten minute "heads up" that they will be transiting Iranian airspace. This is a common procedure for commercial aircraft and involves giving them your call sign, transponder code, type aircraft, and points of origin and destination. This exchange was overheard on the VHF Guard (emergency) frequency 121.5 MHz while flying from Europe to Dubai.
Air Defense Radar: "Unknown aircraft at (location undisclosed), you are in Iranian airspace. Identify yourself."
Aircraft: "This is a United States aircraft. I am in Iraqi airspace."
Air Defense Radar: "You are in Iranian airspace. If you do not depart our airspace we will launch interceptor aircraft!"
Aircraft: "Roger that. This is a United States Navy F-18 fighter jet. Send 'em up!"
Air Defense Radar: ............... (no response ... total silence)