HMS Cubitt (K512) was a Captain-class frigate of the British Royal Navy that served during 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-83, and launched on 11 September 1943.

The ship was transferred to the UK under Lend-Lease on 17 November 1943,[3] and named after Captain J. Cubitt, a Navy officer who commanded the frigate Mary Rose in 1661.

[5] Cubitt visited several Dutch ports immediately after they were liberated, and after VE Day escorted ships to Oslo and Brunsbüttel.

Cubitt was then assigned to "Operation Deadlight", towing surrendered U-boats from Loch Ryan out into the North Atlantic where they were sunk.