New Delhi, Dec. 31 -- In 1987, Marconi Elliot of the UK informed Air Headquarters that they had fitted a nav/attack system in MiG-21Ms of the Egyptian Air Force (EAF). The system consisted of a Head Up Display (HUD), a display processor which also did weapon aiming computations and a air data computer which accepted inputs from the aircraft's pitot static system and twin gyro platform to perform navigation calculations. A colour video camera which recorded HUD symbology to act as a useful mission debrief tool and a keyboard fitted just below the HUD which was the input device, completed the system. Apart from the HUD, keyboard and camera which were fitted in the cockpit the rest of the system was neatly packaged in nose compartment of the a...