HMS Queen Mary was a unique battlecruiser of the Royal Navy, completed in 1913 as the last of her class before World War I. She measured approximately 700 feet in length, with a beam of 89 feet and a deep load draught of 32 feet 4 inches. Displacing around 26,770 long tons normally and up to 31,650 long tons at deep load, she was slightly larger than her Lion-class predecessors. Her propulsion system consisted of two paired Parsons direct-drive steam turbines, producing over 83,000 shp during trials, enabling her to reach a top speed close to 28 knots. Her armament was formidable: eight 13.5-inch Mk V guns in four twin turrets, with a maximum range of over 23,700 yards, and sixteen 4-inch secondary guns primarily in casemates. She also carried two submerged 21-inch torpedo tubes and could fire 1,400-pound shells at a muzzle velocity of 2,490 ft/s. Constructed at Palmer's Shipbuilding in Jarrow, her keel was laid in March 1911, and she was launched in March 1912, with completion in August 1913. Her design featured notable modifications, including the return of officers' quarters to the stern and the addition of a sternwalk, distinguishing her from earlier battlecruisers. Her armor protection was similar to the Lion class, with a 9-inch waterline belt of Krupp cemented armor and 9-inch thick gun turret faces, designed to withstand enemy fire while maintaining high speed. HMS Queen Mary served with the 1st Battlecruiser Squadron under Rear Admiral David Beatty. Her early engagements included participation in the Battle of Heligoland Bight in 1914. During the Battle of Jutland in 1916, she was heavily engaged, successfully hitting German ships but ultimately struck by shells from the German battlecruiser Derfflinger. The hits caused her magazines to explode, resulting in the ship breaking in two and sinking, with the loss of 1,266 crew members. Her wreck was discovered in 1991 resting in the North Sea in pieces, and she is protected under the Protection of Military Remains Act 1986 as a war grave, symbolizing her maritime significance and the human cost of her service.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.