Full obituary in the
Telegraph
"Squadron Leader Harry Scott, who has died aged 89, started his RAF career as a teenage aircraft apprentice and, after training as an air observer, became one of a small group of specialist navigators who pioneered the use of the blind-bombing aid "Oboe" with the Pathfinder Force.
Scott had already survived two tours on bomber operations when, in October 1942, he joined the newly-formed No 109 Squadron equipped with the fast and high-flying Mosquito. Oboe was a ground-controlled, blind-bombing system developed by the Telecommunications Research Establishment and based on the German Knickebein beam bombing system. It required precise navigation and timing for the Mosquito to fly down a narrow radio beam directed towards the target by the ground-based emitter; the aircraft would then drop flares and markers over the target to be used as an aiming point for the main bomber force."