Sink the Tirpitz 1942-44

When Germany invaded the Soviet Union in the summer of 1941, Stalin requested help from the Western Allies. The result was the Arctic Convoys - the opening of a sea route from Britain to Northern Russia, used to supply the Soviets with vitally-needed war materials. This route passed close to German-occupied Norway, and so in January 1942 the newly-completed battleship Tirpitz - sister of the Bismarck - was sent there, to form the core of the naval force stationed in Northern Norway to intercept these convoys. For more than two years, Tirpitz remained a latent threat to the Allies, and despite fuel shortages her occasional sorties posed a grave threat to Allied shipping. So, the sinking of the battleship became a major priority for the British. The fjords where she lurked were strongly-defended, rendering naval attack virtually impossible. So, unless she could be caught at sea, she had to be destroyed by other means.