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・ Operation Trident
・ Operation Trident (1971)
・ Operation Trikora
・ Operation Trinity
・ Operation Trio
・ Operation Trishul
・ Operation Triton
・ Operation Trojan Horse
・ Operation Trojan Horse (book)
・ Operation True Test
・ Operation Truong Cong Dinh
・ Operation Trust
・ Operation Tsunami
・ Operation Tuleta
・ Operation Tumbler–Snapper
Operation Tungsten
・ Operation Tunisia
・ Operation Tupac
・ Operation Turkey Buzzard
・ Operation Tvigi 94
・ Operation Twilight
・ Operation Typhoon Shore
・ Operation Typical
・ Operation Tân
・ Operation U-Go
・ Operation Umeed-e-Nuh
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Operation Tungsten : ウィキペディア英語版
Operation Tungsten

Operation Tungsten was a Second World War Royal Navy air raid that targeted the German battleship ''Tirpitz''. The operation sought to damage or destroy ''Tirpitz'' at her base in Kaafjord in the far north of Norway before she could become fully operational again following a period of repairs.
The British decision to strike Kaafjord was motivated by fears that the battleship, upon re-entering service, would attack strategically important convoys carrying supplies to the Soviet Union. Removing the threat posed by ''Tirpitz'' would also allow the Allies to redeploy the capital ships which had to be held in the North Sea to counter her. After four months of training and preparations, the British Home Fleet sailed on 30 March 1944 and aircraft launched from five aircraft carriers struck Kaafjord on 3 April. The raid achieved surprise, and the British aircraft met little opposition. Fifteen bombs hit the battleship, and strafing by fighter aircraft inflicted heavy casualties on her gun crews. Four British aircraft and nine airmen were lost during the operation.
The damage inflicted during the attack was not sufficient to sink or disable ''Tirpitz'', but 122 members of her crew died and 316 were wounded. The German Navy decided to repair the battleship, and works were completed by mid-July. The British conducted further carrier raids against ''Tirpitz'' between April and August 1944 in the hope of prolonging the period she was out of service, but none were successful. ''Tirpitz'' was eventually disabled and then sunk by Royal Air Force heavy bombers in late 1944.
==Background==
The threat ''Tirpitz'' posed had an important influence on British naval strategy during the Second World War. She was commissioned in February 1941 and completed her crew training late that year. At about the same time the German high command decided to station the battleship in Norway; this deployment was intended to deter a feared Allied invasion of Norway and threaten the convoys which regularly sailed through the Arctic Sea to the Soviet Union.〔Bennett (2012), p. 10〕 These convoys carried large quantities of war material from ports in the UK and Iceland, and were frequently attacked by the German air and naval units stationed in Norway.〔Dear and Foot (2005), p. 35〕 ''Tirpitz'' arrived in Norway in January 1942 and operated from anchorages located in fjords.〔Bennett (2012), pp. 10–11〕 While she was operational the Allies had to keep a powerful force of warships with the British Home Fleet to guard against the possibility of a sortie against the Arctic convoys, and capital ships accompanied most convoys part of the way to the Soviet Union.〔Bennett (2012), p. 9〕〔Faulkner and Wilkinson (2012), p. 109〕
The British attacked ''Tirpitz'' several times during 1942 and 1943. When the battleship sortied to intercept Convoy PQ 12 on 6 March 1942 , which formed part of the convoy's escort, attempted to attack her using torpedo bombers. These aircraft launched twenty torpedoes at the battleship but all missed.〔Bennett (2012), p. 11〕〔Bishop (2012), pp. 78–83〕 On several occasions during 1942 and 1943 bombers from the Royal Air Force and Soviet Air Forces attempted to strike ''Tirpitz'' in her anchorages without success.〔 On 23 September 1943 two British X-class midget submarines succeeded in penetrating the defences around the battleship at her main anchorage at Kaafjord in northern Norway during Operation Source, and placed explosive charges in the water beneath her. This attack caused extensive damage to ''Tirpitz'', putting her out of service for six months.〔Woodman (2004), p. 340〕
Repairs to ''Tirpitz'' were carried out using improvised facilities at Kaafjord as it was considered too risky to attempt to move the damaged warship to Germany. Instead, equipment and work crews were shipped to the fjord from German ports.〔Zetterling and Tamelander (2009), p. 251〕 On the night of 10/11 February 1944, 15 Soviet aircraft attacked the battleship, but did not cause any damage.〔Bishop (2012), p. 295〕 By 17 March, the repairs to ''Tirpitz''s armament, machinery and hull were complete, but several minor repair tasks were outstanding.〔Zetterling and Tamelander (2009), p. 265〕 During the period the ship was under repair, ''Scharnhorst'', the only remaining operational German battleship, was sunk on 26 December during the Battle of the North Cape.〔Zetterling and Tamelander (2009), p. 264〕 Following this engagement the Royal Navy stopped deploying battleships to cover convoys travelling to and from the Soviet Union.〔Hinsley et al. (1984), p. 269〕 By this stage of the war the Allies also had large numbers of anti-submarine and anti-aircraft escort ships available, and were able to assign strong forces to protect all of the Arctic convoys. German submarines operating in the Norwegian Sea were rarely able to evade the convoy escorts, and few merchant vessels suffered damage from enemy attack.〔Dear and Foot (2005), p. 38〕
The British Government and Royal Navy were concerned about the threat ''Tirpitz'' posed once she re-entered service. Allied intelligence tracked the progress of work on the battleship using decrypted German radio signals, photo reconnaissance flights and eyewitness reports from agents in Norway.〔Bishop (2012), pp. 291–293〕 It was feared the battleship could sortie and attack convoys in the Norwegian Sea or Atlantic Ocean after the repairs were completed. The need to guard against this possibility would also occupy warships needed to support the planned invasion of France.〔Bishop (2012), p. 294〕 As a result, it was decided in late 1943 to make further attempts to sink the battleship.〔Zetterling and Tamelander (2009), pp. 266–267〕
Despite Allied concerns, ''Tirpitz'' posed only a limited danger to Allied shipping. From late 1943 the battleship was unable to put to sea for crew training due to the threat of Allied attack and fuel shortages. These shortages also meant the Germans were unable to move the battleship between anchorages to make her more difficult to locate and attack.〔Bennett (2012), p. 14〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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