HMS Plym (K271)
|Builder:||Smiths Dock Co., South Bank-on-Tees|
|Laid down:||1 August 1942|
|Launched:||4 February 1943|
|Commissioned:||16 May 1943|
|Fate:||Destroyed on 3 October 1952 in the Operation Hurricane nuclear bomb test in the Montebello Islands, Western Australia.|
|Class & type:||River class frigate|
|Beam:||36.5 ft (11.13 m)|
|Draught:||9 ft (2.74 m); 13 ft (3.96 m) (deep load)|
|Propulsion:||2 x Admiralty 3-drum boilers, 2 shafts, reciprocating vertical triple expansion, 5,500 ihp|
|Speed:||20 knots (37.0 km/h)|
|Range:||646 long tons (656 t) oil fuel; 7,500 nautical miles (13,890 km) at 15 knots (27.8 km/h)|
|Notes:||Pennant number K271|
Plym saw extensive service on Atlantic convoy escort missions.
Plym, along with HMS Bann, HMS Teviot and HMS Trent, provided anti-submarine escort to the convoy WS-33 which arrived in South Africa from the United Kingdom on 9 October 1943 with critical reinforcements for service in Burma.
Plym was used as the detonation platform for the UK's first nuclear weapon in Operation Hurricane. A 25 kiloton atom bomb was detonated a few seconds before 09:30 local time on 3 October 1952 approximately 400 metres from the island of Trimouille in the Monte Bello Islands, Western Australia.
Although data acquisition would have been simplified by detonating the bomb from a tower above the ground or sea surface, it was conducted aboard the Plym in order to simulate the effects of a nuclear weapon being smuggled into a British harbour aboard a ship, which was considered a real possibility at the time.