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No. 1 Photographic Reconnaissance Unit (or 1 PRU) was a flying unit of the Royal Air Force, first formed in 1940. ==History== On 24 September 1939, the Royal Air Force formally took over the "Heston Flight", a civilian photo reconnaissance unit headed by Sidney Cotton based at Heston Aerodrome.〔Nesbit, p. 84〕 The unit had previously been contracted by MI6 to perform clandestine photographic reconnaissance over Europe, using civilian-registered Lockheed 12A aircraft.〔 The Flight was redesignated several times, first on 1 November 1939 as No. 2 Camouflage Unit,〔Ashworth 1992, p. 159.〕 then on 17 January 1940 as the Photographic Development Unit,〔 then on 18 June 1940 the Photographic Reconnaissance Unit,〔Ashworth 1992, p. 160.〕〔Lake 1999, p. 155.〕 and finally on 14 November 1940, No. 1 Photographic Reconnaissance Unit.〔〔Ashworth 1992, p. 161.〕 The unit was equipped with a variety of aircraft modified for the photographic reconnaissance role, including Supermarine Spitfires, Bristol Blenheims, Lockheed Hudsons and de Havilland Mosquitos. On 18 October 1942, 1 PRU was disbanded and the individual Flights of the Unit were redesignated as five separate squadrons, Nos. 540, 541, 542, 543 and 544 Squadrons. On 1 June 1982, the Unit was revived at RAF Wyton〔Jefford 2001, p. 41.〕 when No. 39 Squadron was disbanded and some of its English Electric Canberra PR.9 reconnaissance aircraft were transferred to a newly formed No. 1 Photographic Reconnaissance Unit. The Unit reverted to its previous identity on 1 July 1992, when it was renumbered No. 39 (1 PRU) Squadron.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「No. 1 Photographic Reconnaissance Unit RAF」の詳細全文を読む スポンサード リンク
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