Tallboys dropped by RAF Lancaster bombers during Operation Catechism. None of the Tallboys struck "Tirpitz". She was struck by two Tallboys that penetrated her armoured deck. In March, 156 day sorties were flown, 31 with Grand Slams and 40 with Tallboys. The designers conceived the Tallboys as town criers. The team concluded that the battleship had been directly hit by two Tallboys. A total of 26 Lancasters were armed with Tallboys and the remainder with JW mines. Despite intense flak, 15 aircraft managed to bomb the target with Tallboys or with bombs. Thirty-two Lancasters attacked the ship with Tallboys during Operation Obviate. Ten Tallboys were also dropped with no effect and no aircraft were lost. He marked the target, and the Lancasters landed three Tallboys on it, destroying it utterly. The Force A aircraft which had not been able to bomb brought their Tallboys back. It was attacked by No. 617 Squadron RAF with Tallboys on July 4. In 1086 the Lord of the Manor was Ivo Tallboys. Tallboys were used by the British to destroy several missile sites.