HMS Seymour was a Parker-class flotilla leader of the Royal Navy, built by Cammell Laird during World War I. Launched on 31 August 1916 and completed by 30 November 1916, she was designed to lead flotillas of smaller destroyers, reflecting an improved design over earlier classes. Measuring 325 feet in overall length and 315 feet between perpendiculars, Seymour had a beam of 31 feet 9 inches and a draught of 12 feet. Her displacement ranged from approximately 1,660 to 1,673 long tons at normal load, rising to about 1,900 long tons at full load. Her propulsion system comprised four Yarrow boilers feeding three Parsons steam turbines, rated at 36,000 shaft horsepower, enabling a top speed of 34 knots. She carried 515 long tons of oil fuel, granting her a range of nearly 4,300 nautical miles at 15 knots. The armament included four QF 4-inch Mk IV guns, arranged with superfiring pairs forward for optimal firing arcs, along with two 2-pounder pom-poms for anti-aircraft defense, and two sets of twin 21-inch torpedo tubes. In 1917, she was modified to carry up to 80 mines, though this capacity was apparently not utilized in combat. Seymour served primarily with the Grand Fleet, initially leading the 11th Destroyer Flotilla at Scapa Flow from December 1916. She participated in key anti-submarine operations, including Operation BB in June 1917, targeting German U-boats, and a subsequent mine-laying operation in October 1917. During these patrols, Seymour and her flotilla made numerous submarine sightings, although no U-boats were confirmed sunk. Following the war, Seymour helped escort the German High Seas Fleet during its internment at Scapa Flow in November 1918. She later served in various flotillas before entering reserve in October 1919. After a refit in 1923, she participated in naval exercises before returning to reserve. Ultimately, Seymour was sold for scrap in January 1931, marking the end of her service life. Her operational history highlights her role in fleet leadership and anti-submarine efforts during a critical period of naval warfare.

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