Operation Title was an unsuccessful Allied attack on the German battleship Tirpitz during the Battle of the Atlantic in World War II. It involved two British Chariot manned torpedoes that were transported close to the battleship's anchorage in Trondheimsfjorden (the Trondheim Fjord) in occupied Norway, by a Norwegian-crewed boat between 26 and 31 October 1942. The attack was abandoned following the accidental loss of both Chariots during the evening of 31 October.

The Allies considered Tirpitz to be a major threat to their shipping, and British Prime Minister Winston Churchill directed that priority be placed on destroying the battleship. Several Royal Air Force (RAF) heavy bomber raids against Tirpitz failed to inflict any damage, and it was decided to use Royal Navy midget submarines instead. Operation Title involved a pair of two-man British Chariot crews, two British support personnel and four members of the Norwegian resistance. They were transported to Norway on board a small boat named Arthur that had been modified to covertly carry the Chariots and their crews. Arthur suffered mechanical problems during the voyage to Trondheimsfjorden, causing delays. Its captain, Leif Larsen, used forged documents to bluff his way through German defences near the mouth of the fjord.

Both Chariots were lost when bad weather caused them to detach from Arthur on 31 October, shortly before the attack was to have begun. This forced the operation to be abandoned. It was not possible for the Allied boat to return to the sea due to German security measures, and Arthur was scuttled. The Allied personnel attempted to escape overland to neutral Sweden, and all but one reached Sweden on 5 November. The other – a British serviceman – was taken prisoner by German forces and murdered on 19 January 1943. Historians regard Operation Title as a skilful attack that failed due to bad luck and faulty workmanship. The British attacked Tirpitz again in September 1943 (Operation Source) using a different type of midget submarine; this operation caused severe damage to the battleship. The Royal Navy conducted several air raids against Tirpitz between April and August 1944, with mixed results. She was crippled by a RAF heavy bomber attack in September 1944 and sunk by another such raid in November that year.

Background Strategic situation Before the outbreak of World War II the (German Navy) developed plans to attack Allied merchant shipping in the event of war. The navy's commander, Grand Admiral Erich Raeder, believed that battleships and cruisers were a key part of this strategy. As a result, the Scharnhorst and Bismarck-class battleships that were constructed in the late 1930s and early 1940s were designed to be capable of making long-range anti-shipping raids into the Atlantic Ocean. Tirpitz was the second of the two Bismarck-class vessels and was launched in April 1939 and commissioned on 25 February 1941.

The made two battleship raids against Allied convoys in the Atlantic Ocean in early 1941. The battleships and conducted Operation Berlin between January and March 1941. During this raid, they sailed from Germany, attacked Allied shipping, and returned to occupied France. A second raid, Operation Rheinübung, was attempted in May and involved the battleship Bismarck and heavy cruiser Prinz Eugen. While the German ships destroyed the British battlecruiser HMS Hood on 24 May, Bismarck was crippled by Fairey Swordfish torpedo bombers from the British aircraft carrier and sank on 27 May after being bombarded by several British battleships from the Home Fleet. The loss of Bismarck left Tirpitz as Germany's only full-sized battleship.

After the German invasion of the Soviet Union on 22 June 1941 the Allies began sending convoys loaded with supplies through the Norwegian Sea and Arctic Ocean to ports in northern Russia. The Arctic convoys that were dispatched during 1941 and early 1942 were lightly opposed. Harsh weather conditions, including extreme cold, heavy seas and gales, made air and naval operations in the area difficult for all of the combatants.

In December 1941 the German military began transferring substantial naval and air forces to northern Norway, which they had occupied since early 1940. The forces sent to Norway were tasked with attacking the Arctic convoys as well as defending the area from an invasion. At this time the German dictator Adolf Hitler wrongly believed the Allies intended to invade Norway. On 12 January 1942 Hitler ordered Tirpitz to be transferred from Germany to Fættenfjord in Norway, which is located to the east of the city of Trondheim and forms part of Trondheimsfjorden (the Trondheim Fjord). The battleship and two escorting destroyers departed Wilhelmshaven in Germany on 14 January and arrived in Trondheim on 16 January. She was to form the main element of a powerful battle group once other German warships arrived in the area. Karl Topp commanded Tirpitz at this time.

The Allies learned of Tirpitzs arrival at Trondheim on 17 January from Ultra intelligence obtained by decrypting intercepted German radio signals. British photo reconnaissance aircraft located the battleship there on 23 January. Sorties were regularly flown over the Trondheim area to monitor her. Due to the threat Tirpitz posed to Allied convoys in the Atlantic Ocean and the Norwegian Sea, British Prime Minister Winston Churchill directed on 25 January that "the destruction or even crippling of this ship is the greatest event at sea at the present time. No other target is comparable to it". The Allies needed to keep a powerful force of warships with the Home Fleet to counter the threat Tirpitz posed and capital ships accompanied most convoys part of the way to the Soviet Union.

Early attacks on Fættenfjord The battleship was relatively safe from air and naval attack at Fættenfjord, as it was distant from British bases and well protected. The defences against air attack included anti-aircraft guns on nearby ships and batteries on the shore as well as equipment that could quickly generate a protective smoke screen. Torpedo nets were installed around Tirpitzs anchorage to counter torpedo attacks and patrol boats operated in Trondheimsfjorden.

The Royal Air Force's (RAF) Bomber Command was directed to attack Tirpitz at Fættenfjord using heavy bombers. The first such raid was made on the night of 28/29 January 1942 by 16 heavy bombers; no damage was inflicted. On 6 March Tirpitz and three escorting destroyers departed Fættenfjord to attack two Allied convoys that were passing through the Norwegian Sea. These convoys were escorted by elements of the British Home Fleet, and planes operating from the aircraft carrier made an unsuccessful attack on Tirpitz on 9 March. Following this operation Hitler directed that Tirpitz was to not attempt further attacks against convoys unless it was first confirmed that no aircraft carriers were nearby.

RAF heavy bombers repeatedly attacked Tirpitz at Fættenfjord during March and April 1942. Raids were conducted on the nights of 30/31 March, 27/28 April and 28/29 April. No damage was caused to the battleship, and 12 British aircraft were destroyed. These raids had to be conducted at night as the German air defences in the region made daytime attacks too risky. The lengthening duration of daylight as spring wore on led to a decision to not make further heavy bomber attacks until autumn.

After Tirpitz arrived in Norway the British deputy commander of the Shetland Bus covert transport unit, Sub Lieutenant David Howarth, developed a proposal to attack the battleship. This force was jointly administered by the British MI6 and Special Operations Executive (SOE) intelligence agencies, and comprised small Norwegian-crewed ships that smuggled personnel and supplies between Norway and the UK. Howarth proposed arming one of the Shetland Bus ships with two torpedoes fitted below its hull. The ship would infiltrate Trondheimsfjorden and fire the torpedoes as it passed Tirpitzs anchorage. Howarth discussed this scheme with the highly experienced Shetland Bus captain Leif Larsen, who offered to command the attack. The Shetland Bus force's commanding officer Major Leslie Mitchell submitted the plan to the Admiralty (the government department which oversaw the Royal Navy), but nothing came of it.

On 2 July 1942 Tirpitz and several other German warships sailed from Fættenfjord to Altenfjord in northern Norway to be held ready to attack Convoy PQ 17. The head of the Royal Navy, Admiral of the Fleet Dudley Pound, ordered the ships sailing in the convoy to scatter and proceed to the USSR individually after learning of the German force's presence. Tirpitz sortied on 5 July, but was ordered by Hitler to return to Altenfjord the next day after a British aircraft carrier was detected. German aircraft and submarines inflicted heavy losses on the ships that had sailed with PQ 17; twenty-four were destroyed.

Following the operation against Convoy PQ 17 Tirpitz sailed to Bogen Bay near Narvik in northern Norway, arriving there on 8 July. She remained at this anchorage for several months. In September it was decided to return the battleship to Fættenfjord to undertake maintenance. During the period Tirpitz was at Narvik the British judged that she would return to Fættenfjord as the anti-aircraft batteries there remained in place.

Development of the Chariot

The destruction of Convoy PQ 17 led to an increased determination among the Allied leadership to neutralise Tirpitz. As the RAF raids had failed, the Admiralty came to believe that attacks against the battleship at its anchorage using small submarines should be attempted. It was not possible to use full-sized submarines as the shallow depth of Fættenfjord meant that they would likely be detected before an attack could be made.

At this time the Royal Navy had two types of small submarines under development, the Chariot manned torpedo and the X-class midget submarines. Development of both types had begun in 1940. Manned torpedoes were used by the Regia Marina (Italian Navy) to damage two British battleships, while at anchor at their base in Alexandria, Egypt, on 19 December 1941. Following this attack Churchill asked the Chiefs of Staff Committee to explain "what is being done to emulate the exploits of the Italians in Alexandria Harbour". By the start of February 1942 the commander of the Royal Navy's submarine service, Admiral Max Horton, was developing plans to use manned torpedoes and midget submarines.

Trials of the first Chariot manned torpedo began in April 1942. Volunteers to operate Chariots and midget submarines were also sought in early 1942. The appeal issued by Horton noted that the volunteers would undertake "hazardous service" but, to preserve secrecy, did not specify what this would involve. By April 1942 30 men had been recruited.

The Chariot had a crew of two, a commander and a number two. It was long and weighed . Its single propeller was powered by an electric battery which gave a maximum range of when travelling at . The craft were armed with a single detachable warhead containing of explosives. It was intended that Chariots would be transported by a ship to near their target. The crew would then penetrate the enemy defences, which were expected to include metal anti-submarine and anti-torpedo nets. Once done, the number two would attach the warhead to the target ship's hull using magnets. The warheads had a time-delay fuse to allow the Chariot crews to escape before it detonated. As the Chariot did not have enough range to return to its mother ship, it was intended their crews would head for the shore after completing their attack and escape overland to neutral Sweden.