Boeing said it submitted a proposal to the U.S. Air Force to upgrade the cockpits of its fleet of 59 KC-10 Extender tanker/transport aircraft. The proposal covers engineering and manufacturing development, production and installation of the KC-10 Communications, Navigation, Surveillance and Air Traffic Management (CNS/ATM) modification. "This upgrade will allow the fleet to retain worldwide access to airspace in compliance with Global Air Traffic Management requirements," said Boeing KC-10 Program Director Mike Wright.