HMS Cranstoun (K511)
|Laid down:||9 June 1943|
|Launched:||28 August 1943|
|Commissioned:||13 November 1943|
|Decommissioned:||3 December 1945|
|Struck:||7 February 1946|
|Fate:||Sold for scrapping, 20 November 1947|
|Class and type:||Captain-class frigate|
|Beam:||36 ft 9 in (11.20 m)|
|Draught:||9 ft (2.7 m)|
|Speed:||24 knots (44 km/h; 28 mph)|
|Range:||5,500 nmi (10,200 km) at 15 kn (28 km/h; 17 mph)|
|Victories:||U-1063 (15 April 1945)|
HMS Cranstoun (K511) was a Captain-class frigate of the British Royal Navy that served in the last two years of World War II. The ship was laid down as a Buckley-class destroyer escort at the Bethlehem-Hingham Shipyard at Hingham, Massachusetts on 9 June 1943, with the hull number DE-82, and launched on 28 August 1943. The ship was transferred to the UK under Lend-Lease on 13 November 1943, and named after Captain James Cranstoun, an officer who served in the American Revolutionary and French Revolutionary Wars.
At 21:14 on the evening of 15 April 1945 Cranstoun and Loch Killin, while part of the escort to Convoy TBC 128, detected the U-1063 in Bigbury Bay, Devon. The two ships mounted a coordinated attack, with Loch Killin using her Squid anti-submarine mortar three times and Cranstoun her Hedgehog mortar once, to force the U-boat to the surface. Burges then also joined the attack, as the U-boat was illuminated by the ship's searchlights and fired on with 20 mm and 40 mm guns. U-1063 attempted to escape, but Loch Killin attacked with depth charges and sank her. Only 17 of the crew survived.
- Tynan, Roy (2006). "Captain Class Frigate - Battle Honours". captainclassfrigates.co.uk. Retrieved 9 April 2011.
- Helgason, Guðmundur (2011). "Allied Warships of WWII : HMS Cranstoun". German U-boats of WWII - uboat.net. Retrieved 9 April 2011.
- Collingwood, Donald (1998). The Captain Class Frigates in the Second World War. Barnsley: Leo Cooper. ISBN 0-85052-615-9.
- Phillips, Stephen (2003). "Into the Lion's Den: The Loss of U-1063". ubootwaffe.net. Archived from the original on 30 July 2007. Retrieved 9 April 2011.