HMS Cossack was a Tribal-class destroyer of the Royal Navy, launched in 1937 and commissioned in 1938. As part of the Tribal-class, she was designed to be significantly larger and more heavily armed than previous destroyers, with a standard displacement of approximately 1,891 long tons and a deep load displacement of about 2,519 long tons. She measured 377 feet in length overall, with a beam of 36 feet 6 inches and a draught of 11 feet 3 inches. Her propulsion system consisted of two Parsons geared steam turbines powered by three Admiralty three-drum boilers, producing 44,000 shaft horsepower and allowing her to reach speeds up to 36 knots, with sea trials recording a maximum of 36.2 knots. Cossack's armament included eight 4.7-inch (120 mm) QF Mark XII guns in four superfiring twin mounts, with additional anti-aircraft weaponry such as quadruple mounts for 40 mm "pom-pom" guns and 0.5-inch machine guns. She was also equipped with a single quadruple mount for 21-inch torpedoes and had some anti-submarine capabilities, including ASDIC, depth charges, and a depth charge rack and throwers, though these were initially limited. Her service history was marked by notable engagements, including the Altmark Incident in February 1940, where she successfully boarded the German supply ship Altmark in Norwegian waters to rescue prisoners, an event that drew international protests. Cossack participated in the Second Battle of Narvik in April 1940, where she was damaged after engaging the German destroyer Z17, ran aground, and was later repaired. She also played a role in the hunt for the German battleship Bismarck in May 1941, contributing to the efforts to disable the formidable warship. Tragically, HMS Cossack was torpedoed by U-563 on 23 October 1941 while escorting a convoy from Gibraltar. Despite attempts to tow her, she sank in the Atlantic west of Gibraltar on 27 October, with the loss of 159 crew members. Her service was significant in demonstrating the versatility and combat capability of the Tribal-class destroyers during the early years of World War II.

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