The British remained determined to sink "Tirpitz" as soon as possible. Shortly after the 29 October raid, it was decided to use the same plans as had been employed in Operation Obviate in the next attack, which was designated Operation Catechism. On 12 November, Nos. 9 and 617 Squadrons set out from northern Scotland again. The weather over the Tromsø area was clear when they arrived, and "Tirpitz" was hit by two Tallboy bombs. The damage from these bombs and several near misses caused the battleship to capsize. Between 940 and 1,204 of her crew were killed.