The Castle-class ships were equipped with a single QF 4-inch (102 mm) Mk XVI gun forward, but their primary weapon was their single three-barrel Squidanti-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-millimetre (0.8 in) Oerlikon light AA guns.[2] 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 277search radar and a HF/DFradio direction finder rounded out the Castles' sensor suite.[3]
Construction and career
Caistor Castle was laid down by John Lewis & Sons at their shipyard in Aberdeen on 26 August 1943 and launched on 22 May 1944. She was completed on 29 September and served as a convoy escort until the end of the war in May 1945. After the war, Caistor Castle was in reserve at Devonport from 1947 until 1948.[4] She represented the Reserve Fleet at the 1953 Coronation Review[5] and served in the Second Training Squadron at Portland from February 1953 until 1955.[6]Caistor Castle was then placed in reserve at Devonport before being sold for scrap to Arnott Young in 1956; the ship arrived at Dalmuir in March to be broken up.[7]
Goodwin, Norman (2007). Castle Class Corvettes: An Account of the Service of the Ships and of Their Ships' Companies. Liskeard, UK: Maritime Books. ISBN978-1-904459-27-9.
Lenton, H. T. (1998). British & Empire Warships of the Second World War. Annapolis, Maryland: Naval Institute Press. ISBN1-55750-048-7.
Rohwer, Jürgen (2005). Chronology of the War at Sea 1939–1945: The Naval History of World War Two (Third Revised ed.). Annapolis, Maryland: Naval Institute Press. ISBN1-59114-119-2.