sentences:  Lumby, sailed from the shipbuilding yards to Holy Loch, where she was commissioned into the Royal Navy three days later as "P247".During the following month "Saracen" conducted training exercises, then departed harbour for her first war patrol, off Norway, on 29 July 1942.After only five days at sea on 3 August, the boat torpedoed and sank the in the North Sea, northeast of the Faroe Islands.