HMS Bamborough Castle (K412)

HMS Bamborough Castle was one of 44 Castle-class corvettes built for the Royal Navy during World War II. Completed in mid-1944 she sank the U-boat GS U-387 on 9 December. Aside from a brief period assigned to the Fishery Protection Squadron in 1946, the rest of her career was spent as part of the fleet reserve until she was scrapped in May 1959.

Design and description
The Castle-class corvette was a stretched version of the preceding Flower class, enlarged to improve seakeeping and to accommodate modern weapons. The ships displaced 1010 LT at standard load and 1510 LT at deep load. They had an overall length of 252 ft, a beam of 36 ft and a deep draught of 14 ft. They were powered by a pair of triple-expansion steam engines, each driving one propeller shaft using steam provided by two Admiralty three-drum boilers. The engines developed a total of 2880 ihp and gave a maximum speed of 16.5 kn. The Castles carried enough fuel oil to give them a range of 6500 nmi at 15 kn. The ships' complement was 99 officers and ratings.

The Castle-class ships were equipped with a single QF 4 in 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 20 mm 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 277 search radar and a HF/DF radio direction finder rounded out the Castles' sensor suite.

Construction and career
Bamborough Castle was laid down by J. Lewis & Sons at their shipyard in Aberdeen on 1 July 1943 and launched on 11 January 1944. She was completed on 30 May and served as a convoy escort, sinking the German U-boat GS U-387 in the Barents Sea with depth charges on 9 December 1944. The ship was placed in reserve on 25 May 1945. Bamborough Castle was reactivated in January 1946 and assigned to the Fishery Protection Flotilla based at Plymouth before she returned to reserve in 1947. The ship was sold for scrap in 1959 and arrived at Llanelli on 22 May to be broken up.