Operation Catechism

About

Operation Catechism was the British air raid of World War II that destroyed the German battleship Tirpitz. It was conducted on 12 November 1944 by 29 heavy bombers from the Royal Air Force, which attacked the battleship at its anchorage near the Norwegian city of Tromsø. The ship capsized after being hit by at least two bombs and damaged by the explosions of others, killing between 940 and 1,204 members of the crew; the British suffered no casualties.

The attack ended a long-running series of air and naval operations against Tirpitz that sought to eliminate the threat she posed to Allied shipping. The battleship had been moved to the Tromsø area in October 1944 after being crippled on 15 September during Operation Paravane. This attack had been carried out by the RAF's elite Nos. 9 and 617 Squadrons, who unsuccessfully attempted to strike Tirpitz again at Tromsø on 29 October during Operation Obviate.