No. 617 Squadron RAF
No. 617 Squadron is a Royal Air Force aircraft squadron commonly known as The Dambusters for its actions during Operation Chastise against German dams during the Second World War, originally based at RAF Scampton in Lincolnshire and currently based at RAF Marham in Norfolk. In the early 21st century it operated the Panavia Tornado GR4 in the ground attack and reconnaissance role until being disbanded on 28 March 2014. The Dambusters reformed on 18 April 2018, and was equipped at RAF Marham in June 2018 with the Lockheed Martin F-35B Lightning, becoming the first squadron to be based in the UK with this advanced STOVL type. The unit is composed of both RAF and Royal Navy personnel, and operates from the Royal Navy's aircraft carriers.
History
Between the wars
According to the squadron's entry in Flying Units of the RAF by Alan Lake, No. 617 Squadron was allocated the unit identification code MZ for the period April to September 1939, even though the unit did not actually exist at the time.Second World War
The squadron was formed on 21 March 1943 at RAF Scampton on Avro Lancaster heavy bombers.It was formed under great secrecy for the specific task of attacking three major dams that contributed water and power to the Ruhr industrial region in Nazi Germany: the Möhne, Eder, and Sorpe. The plan was given the codename Operation Chastise and carried out on 17 May 1943. The squadron had to develop the tactics to deploy Barnes Wallis's "Bouncing bomb", and undertook some of its training over the dams of the Upper Derwent Valley in Derbyshire, as the towers on the dam walls were similar to those to be found on some of the target dams in Germany.
The squadron's badge, approved by King George VI, depicts the bursting of a dam in commemoration of Chastise. The squadron's chosen motto was
, a humorous double entendre on a famous saying of Madame de Pompadour to King Louis XV, made on the loss at the Battle of Rossbach by the French. The original commander of No. 617 Squadron, Wing Commander Guy Gibson, was awarded the Victoria Cross for his part in the raid.
After the raid, Gibson was withdrawn from flying and went on a publicity tour. Wing Commander George Holden became commanding officer in July, but he was shot down and killed on his fourth mission, Operation Garlic in September 1943, in an attack on the Dortmund-Ems Canal; he had four of Gibson's crew with him. H. B. "Mick" Martin took command temporarily, before Leonard Cheshire took over as CO. Cheshire developed and personally took part in the special target marking techniques required, which went far beyond the precision delivered by the standard Pathfinder units – by the end he was marking the targets from a Mustang fighter. He was also awarded the VC.
On 15 July 1943, 12 aircraft of the squadron took off from Scampton to attack targets in Northern Italy. All aircraft attacked and proceeded to North Africa without loss. The targets were San Polo d'Enza and Arquata Scrivia power stations; it was hoped that the attacks would delay German troops who were travelling down into Italy on the electrified railway system to support the Italian front. The operation met little opposition but the targets were obscured by valley haze and were not destroyed. The 12 crews returned to Scampton on 25 July from North Africa after bombing Leghorn docks on the return journey. The raid on Leghorn Docks was not a great success, due to mist shrouding the target. On 29 July 1943 nine aircraft took off from Scampton to drop leaflets on Milan, Bologna, Genoa and Turin in Italy. All aircraft completed the mission and landed safely in Blida, North Africa.
The UK Government considered using No. 617 Squadron to target the Italian leader Mussolini in July or August 1943. The British believed if Mussolini was killed it might take Italy out of the war. It would have been a flight carried out at extremely low level with the targets of Mussolini's headquarters and residence in Rome. Neither of these targets were within 1,500 yards of the Vatican, which the Allies had promised not to damage. However within two weeks of the plan being suggested, Mussolini was ousted by his opponents and replaced by Pietro Badoglio, leading to an armistice with the Allies in September.
Throughout the rest of the war, the squadron continued in a specialist and precision-bombing role, including the use of the enormous "Tallboy" and "Grand Slam" ground-penetrating earthquake bombs, on targets such as concrete U-boat shelters and bridges. Several failed attempts were made on The Dortmund-Ems Canal in 1943 ; it was finally breached with Tallboys in September 1944.
In March 1945 the squadron used the Grand Slam bomb for the first time, against the Bielefeld viaduct, wrecking it. The viaduct had withstood 54 previous attacks without being permanently neutralized.
The Squadron's skills in precision flying were also used in the Normandy invasion, as part of an effort to deceive the Germans as to the location of the Allied invasion. Beginning on the night before the D-day landings, the Squadron dropped thin strips of aluminium foil over the waters off Cap d'Antifer, about from the D-Day landings. The strips were dropped in vast numbers, in carefully choreographed patterns, over many hours, to create on German radar an illusion of a huge approaching naval fleet, even though the ships were non-existent. The Squadron practised the technique at Tantallon Castle in Scotland, using captured German Würzburg, Freya, and Seetakt radars.
File:Royal Air Force Bomber Command, 1942-1945. CH17864.jpg|thumbnail|right|No. 617 Squadron Avro Lancaster B.I EE146 at RAF Woodhall Spa with its crew the day after the successful attack against Tirpitz
A series of attacks caused the disabling and sinking of Tirpitz, a major German battleship that had been moved into a fjord in northern Norway where she threatened the Arctic convoys and was too far north to be attacked by air from the UK. She had already been damaged by an attack by Royal Navy midget submarines and a series of attacks from carrier-borne aircraft of the Fleet Air Arm, but both attacks had failed to sink her. The task was given to No. IX and No. 617 Squadrons; they were deployed to Yagodnik, near Archangel a staging base in Russia to attack Tirpitz with Tallboy bombs. On 15 September 1944, the RAF bombers struck the battleship in the forecastle, which rendered her unseaworthy, so she was sent to the Tromsø fjord where temporary repairs were made so she was anchored as a floating battery. This fjord was in range of bombers operating from Scotland and from there, in October, she was attacked again, but cloud cover thwarted the attack. Finally on 12 November 1944, the two squadrons attacked Tirpitz. The first bombs missed their target, but following aircraft scored two direct hits in quick succession. Within ten minutes of the first bomb hitting the Tirpitz, she suffered a magazine explosion at her "C" turret and capsized killing 1,000 of her 1,700 crew. All three RAF attacks on Tirpitz were led by Wing Commander J. B. "Willy" Tait, who had succeeded Cheshire as CO of No. 617 Squadron in July 1944. Among pilots participating in the raids was Flight Lieutenant John Leavitt, an American who piloted one of the 31 Lancasters. Leavitt's aircraft dropped one of the bombs that hit Tirpitz dead centre. Despite both squadrons claiming that it was their bombs that sank the Tirpitz, it was the Tallboy bomb, dropped from a No. IX Squadron Lancaster WS-Y piloted by Flying Officer Dougie Tweddle that is attributed to the sinking of the warship. F/O Tweddle was awarded the Distinguished Flying Cross for his part in the operations against Tirpitz.
During the Second World War the Squadron carried out 1,599 operational sorties with the loss of 32 aircraft.
Cold War (1946–1981)
After the end of the Second World War, the squadron replaced its Lancasters with Avro Lincolns, following those in 1952 with the English Electric Canberra jet bomber. The squadron was deployed to Malaya for four months in 1955, returning to RAF Binbrook to be disbanded on 15 December 1955.Reformed at RAF Scampton on 1 May 1958 as part of RAF Bomber Command's V-bomber force maintaining the UK's strategic nuclear deterrent, the squadron was equipped with the Avro Vulcan B1 from August 1960. By 23 May 1961, its aircraft were the upgraded Vulcan B1A fitted with the electronic countermeasures tail pod. The squadron's assigned role was high-level strategic bombing with a variety of free fall nuclear bombs. These may have included Blue Danube, Red Beard, Violet Club the Interim Megaton Weapon, Yellow Sun Mk.1 and certainly Yellow Sun Mk2. American bombs were also supplied to the RAF V-bombers for a short period under the Project E arrangements.
The squadron began almost immediately to upgrade to the Vulcan B2, taking delivery of the first on 1 September 1961, although its high-level strategic bombing role remained unchanged until the advent of effective Soviet Surface-to-Air Missiles forced Bomber Command to reassign V-bombers from high-altitude operations to low-level penetration operations in March 1963, when the squadron's Vulcans adopted a mission profile that included a 'pop-up' manoeuvre from to above for safe release of Blue Steel.
Vulcans were configured for the Blue Steel stand-off bomb and 617 Squadron was the first to be declared operational with it in August 1962, until in January 1970 the squadron's eight Vulcan B2 aircraft were re-equipped with the new strategic laydown bomb, WE.177B which improved aircraft survivability by enabling aircraft to remain at low level during weapon release.
Following the transfer of responsibility for the nuclear deterrent to the Royal Navy, the squadron was reassigned to SACEUR for tactical strike missions. In a high-intensity European war the squadron's role was to support land forces on the Continent by striking deep into enemy-held areas beyond the forward edge of the battlefield, striking at enemy concentrations and infrastructure, with WE.177 tactical nuclear weapons, should a conflict escalate to that stage. The squadron's eight aircraft were allocated eight WE.177 nuclear bombs. As the Vulcan's bomb bay was configured to carry only one, and assuming that RAF staff planners had factored in their usual allowance for attrition in the early conventional phase of a continental war, leaving sufficient surviving aircraft to deliver the full stockpile of nuclear weapons, it is a reasonable conclusion that the Vulcan force was held in reserve for nuclear strike duties only. The squadron's Vulcan B2s served mainly in that low-level penetration role until disbandment on 31 December 1981.