prevent her from capsizing, and anti-torpedo nets were installed. Tirpitz retained a one-degree list to port from earlier damage, and this was not corrected by counter-flooding to retain as much reserve buoyancy as possible. The ship was also prepared for her role as a floating artillery platform: fuel was limited to what was necessary to power the turbo-generators, and the crew was reduced to 1,600 officers and enlisted men. Operation Catechism Operation Catechism, the final British attack on Tirpitz, took place on 12 November 1944. The ship again used her 38 cm guns against the bombers, which approached the battleship at 09:35; Tirpitzs main guns forced the bombers to disperse temporarily, but could not break up the attack. A force of 32 Lancasters from Nos. 9 and 617 Squadrons dropped 29 Tallboys on the ship, landing two direct hits and one near miss. Several other bombs landed within the anti-torpedo net barrier and caused significant cratering of the seabed; this removed much of the sandbank that had been constructed to prevent the ship from capsizing. One bomb penetrated the ship's deck between turrets Anton and Bruno but failed to explode. A second hit amidships between the aircraft catapult and the funnel and caused severe damage. A very large hole was blown in the ship's side and bottom; the entire section of belt armour abreast of the bomb hit was completely destroyed. A third bomb may have struck the port side of turret Caesar. The amidships hit caused significant flooding and quickly increased the port list to between 15 and 20 degrees. In ten minutes the list increased to 30 to 40 degrees, and the captain issued the order to abandon ship. The list increased to 60 degrees by 09:50; this appeared to stabilise temporarily. Eight minutes later, a large explosion rocked turret Caesar. The turret roof and part of the rotating structure were thrown into the air and into a group of men swimming to shore, crushing them. Tirpitz rapidly rolled over and buried her superstructure in the sea floor. In the aftermath of the attack, 82 men trapped in the upturned hull were rescued by cutting through the exposed bottom. Figures for the death toll vary from approximately 950 to 1,204. Approximately 200 survivors of the sinking were transferred to the heavy cruiser Lützow in January 1945. The performance of the Luftwaffe in the defence of Tirpitz was heavily