HMS Flint Castle (K383) was one of 44 s built for the Royal Navy during World War II. Completed at the end of 1943, the ship ran aground while training in January 1944. After repairs were completed the following month, she was briefly assigned to the 39th Escort Group for convoy escort duties in the Atlantic Ocean. Flint Castle was transferred to Escort Group B2 in March and screened convoys to and from Gibraltar until September. That month, she joined Escort Group B3 to escort convoys between Canada and Britain and continued to do so until the end of the war in May 1945. The ship then became an anti-submarine training ship in Rosyth and Campbeltown, Scotland, before moving to Portland at the beginning of 1947. Flint Castle remained there until she was taken out of service in March 1956 and broken up beginning in July 1958. Design and description The Castle-class corvette was a stretched version of the preceding , enlarged to improve seakeeping and to accommodate modern weapons. The ships displaced at standard load and at deep load. The ships had an overall length of , a beam of and a deep draught of . They were powered by two 4-cylinder triple-expansion steam engines, each driving one propeller shaft, using steam provided by two Admiralty three-drum boilers. The engines developed a total of and gave a maximum speed of . The Castles carried a maximum of of fuel oil that gave them a range of at . The ships' complement was 99 officers and ratings. The Castle-class ships were equipped with a single QF Mk XVI gun forward, but their primary weapon was their single three-barrel Squid anti-submarine mortar. This was backed up by one depth charge rail and two throwers for 15 depth charges. The ships were fitted with two twin and a pair of single mounts for Oerlikon light AA guns. Provision was made for a further four single mounts if needed. They were equipped with Type 145Q and Type 147B ASDIC sets to detect submarines by reflections from sound waves beamed into the water. A Type 272 search radar and a HF/DF radio direction finder rounded out the Castles' sensor suite. Construction and career Flint Castle, the only ship of her name to serve in the Royal Navy, was ordered on 19 January 1943 and laid down by Henry Robb at their shipyard in Leith,