Squadron Leader Gurbachan Singh has been serving as the Chief Instrumentation and Electrical Officer at an Aircraft and Armament Testing Unit since May, 1969. He was largely responsible for the successful development of a number of aircraft instruments and aids. These tasks were undertaken by him in addition to the normal heavy commitment of flight trials systems assessment and flight test instrumentations. He has worked as the Chief Project Officer of the Unit and in this capacity has been responsible for the planning and execution of some flight trials programmes. He kept himself well informed about modern developments in aircraft system, and is an Associate Fellow of the Royal Aeronautical Society.