in the double bottom of the port side, which caused a list of one to two degrees, which was balanced by counter-flooding on the starboard side. The flooding damaged all of the turbo-generators in generator room No. 2, and all apart from one generator in generator room No. 1 were disabled by broken steam lines or severed power cables. Turret Dora was thrown from its bearings and could not be rotated; this was particularly significant, as there were no heavy-lift cranes in Norway powerful enough to lift the turret and place it back on its bearings. The ship's two Arado Ar 196 floatplanes were completely destroyed. Repairs were conducted by the repair ship ; historians William Garzke and Robert Dulin remarked that the successful repair effort was "one of the most notable feats of naval engineering during the Second World War". Repairs lasted until 2 April 1944; full speed trials were scheduled for the following day in Altafjord. Operation Tungsten The British were aware that Neumark and the repair crews left in March, which intimated Tirpitz was nearly operational. A major air strike—Operation Tungsten—involving the fleet carriers Victorious and and the escort carriers , , , and , was set for 4 April 1944, but rescheduled a day earlier when Enigma decrypts revealed that Tirpitz was to depart at 05:29 on 3 April for sea trials. The attack consisted of 40 Barracuda dive-bombers carrying , and armour-piercing bombs and 40 escorting fighters in two waves, scoring fifteen direct hits and two near misses. The aircraft achieved surprise, and only one was lost in the first wave; it took twelve to fourteen minutes for all of Tirpitzs anti-aircraft batteries to be fully manned. The first wave struck at 05:29, as tugs were preparing to assist the ship out of her mooring. The second wave arrived over the target an hour later, shortly after 06:30. Despite the alertness of the German anti-aircraft gunners, only one other bomber was shot down. The air strikes did not penetrate the main armour but nonetheless caused significant damage to the ship's superstructure and inflicted serious casualties. William Garzke and Robert Dulin report the attack killed 122 men and wounded 316 others, while Hildebrand, Röhr, & Steinmetz report 132 fatalities and 270 wounded men, including the ship's commander, KzS Hans Meyer. Two of the 15 cm turrets were destroyed by bombs, and both Ar 196 floatplanes were