HMS Defender was an Acheron-class destroyer built for the Royal Navy in 1911, representing the fifth vessel to bear the name. Constructed by William Denny & Brothers in Dumbarton, Scotland, she was laid down on 7 November 1910, launched on 30 August 1911, and completed by January 1912 at a cost of £83,000. The ship featured a sleek design capable of reaching speeds up to 27 knots (50 km/h), making her a swift and agile warship of her time. Her armament included two 4-inch (102 mm) guns and smaller guns, complemented by 21-inch (530 mm) torpedo tubes, and she was crewed by approximately 70 men. HMS Defender served prominently in the First Destroyer Flotilla, attached to the Grand Fleet during World War I. She participated in several notable naval engagements, including the Battle of Heligoland Bight on 28 August 1914, where she was involved in rescue operations following the sinking of the German destroyer SMS V187. During the operation, she helped rescue survivors and even assisted German prisoners and crew members, exemplifying her role in humanitarian efforts at sea. On 24 January 1915, Defender was present at the Battle of Dogger Bank, supporting the fleet. She also took part in the Battle of Jutland on the night of 31 May – 1 June 1916, where she sustained damage from a 12-inch shell that knocked out her forward boiler room, reducing her speed. Despite this, she managed to tow the damaged destroyer HMS Onslow to Aberdeen, an action praised by Admiral Beatty and recognized for its gallantry. Captain Lieutenant Commander L R Palmer received the Distinguished Service Order for his leadership during this event. In 1918, HMS Defender was involved in a friendly fire incident in the Strait of Otranto, where she was mistakenly targeted by U.S. Navy submarine chasers, resulting in minor damage and the towing of the damaged HMS Nymphe. After the war, she was laid up and sold for breaking up in 1921. HMS Defender's service history underscores her role as a resilient and active participant in key naval operations during the First World War, reflecting the versatility and bravery of early 20th-century destroyers.

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