service, the ships proved to be very wet on the surface, with the bow tending to dig down, and one of the 4-inch guns and the revolving torpedo-tube mount was removed. The normal crew was 59 officers and other ranks. K13 was one of 12 K-class submarines ordered in August 1915, following on from the first 2 ordered in June that year. She was laid down at Fairfield's Govan shipyard in October 1915 as Yard number 522, and was launched on 11 November 1916. Accident On 29 January 1917, K13 was undergoing final pre-acceptance trials in the Gareloch, Dunbartonshire, Scotland. During a dive in the morning, a small leak had been reported in the boiler rooms, so a second dive was programmed for the afternoon. All boiler room vents were opened to clear the boiler room of steam to aid searching for the leaks. At about 3:00 pm, the submarine went to diving stations, and after confirming that the engine room had been shut off, the submarine was dived. She had 80 people on board - 53 crew, 14 employees of the shipbuilders, five sub-contractors, five Admiralty officials, Joseph Duncan, a River Clyde pilot, Commander Francis Goodhart and engineering officer, Lieutenant Leslie Rideal, both from her sister ship K14, which was still under construction. As she dived, seawater was seen to be entering K13s engine room, and the submarine's commanding officer, Lieutenant-Commander Godfrey Herbert ordered watertight doors to be shut and ballast tanks to be blown to bring the submarine to the surface, and then the drop keels released. Despite this, the dive could not be stopped and the submarine was soon stuck fast on the bottom of the Gareloch. The crew of , another submarine undergoing trials on the Gareloch, watched K13 dive and became concerned that the dive did not "look right" and raised the alarm. Two men were seen on the surface by Annie MacIntyre, a maid in a hotel a mile or so away, but her report was ignored. The first rescue vessel, the torpedo gunboat had started searching for K13 using grapples by 23:00. Attempts to send divers down were delayed since Gossamer had a diving-suit but no diver, and when a diver arrived from Fairfields, he was nearly drowned when the suit, which had not been used for years, burst. Despite the lack of proper escape apparatus, Herbert, and the commander of K14, Commander