Low Level Bombsight, Mark III use in October 1942. Coastal Command had priority on deliveries and only small numbers reached Bomber Command. The first examples arrived in May 1943 and were fit to Douglas Boston bombers of 2 Group. In 1944 the sight was trialled on the Avro Lancasters of No. 617 Squadron RAF, the Dambusters, who carried out a single low-level attack with them in late 1944. Most examples sent to Bomber Command equipped a small number of De Havilland Mosquito aircraft in No. 627 Squadron RAF (who normally operated as pathfinders) and No. 8 Group RAF (Pathfinder Force). The sight remained with Coastal
Dave Shannon for the Dambusters memorial at Woodhall Spa near RAF Scampton. His wife Ann died in 1990, and he married artist Eyke Taylor in a civil ceremony at Camberwell, London, on 19 July 1991. On 8 April 1993, shortly before a planned fiftieth anniversary reunion of surviving Dambusters, Shannon died at Denmark Hill, London, following a stroke, and was buried beside Ann at Clifton Hampden, Oxfordshire. The last of the nine pilots who took part in the first wave of the dams raid, he was survived by his second wife and his daughter by Ann. On 17 May 2008, the sixty-fifth