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HMS Onslaught (S14)
Submarine of the Royal Navy From Wikipedia, the free encyclopedia
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HMS Onslaught was a British Oberon-class attack submarine operated by the Royal Navy.
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Design and construction
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The Oberon class was a direct follow on of the Porpoise-class, with the same dimensions and external design, but updates to equipment and internal fittings, and a higher grade of steel used for fabrication of the pressure hull.[1]
As designed for British service, the Oberon-class submarines were 241 feet (73 m) in length between perpendiculars and 295.2 feet (90.0 m) in length overall, with a beam of 26.5 feet (8.1 m), and a draught of 18 feet (5.5 m).[2] Displacement was 1,610 tons standard, 2,030 tons full load when surfaced, and 2,410 tons full load when submerged.[2] Propulsion machinery consisted of 2 Admiralty Standard Range 16 VMS diesel generators, and two 3,000 shaft horsepower (2,200 kW) electric motors, each driving a 7-foot-diameter (2.1 m), 3-bladed propeller at up to 400 rpm.[2] Top speed was 17 knots (31 km/h; 20 mph) when submerged, and 12 knots (22 km/h; 14 mph) on the surface.[2] Eight 21-inch (530 mm) diameter torpedo tubes were fitted (six facing forward, two aft), with a total payload of 24 torpedoes.[2] The boats were fitted with Type 186 and Type 187 sonars, and an I-band surface search radar.[2] The standard complement was 68: 6 officers, 62 sailors.[2]
Onslaught was laid down by Chatham Dockyard on 8 April 1959, and launched on 24 September 1960.[2] The boat was commissioned into the Royal Navy on 14 August 1962.[2]
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Operational history
![]() | This section needs expansion. You can help by adding to it. (June 2015) |
Onslaught was first assigned to the 2nd Submarine Squadron, based in Devonport. She was reassigned to the Singapore-based 7th Squadron in 1966, and received a refit in Devonport from 1970 to 1972. She was then assigned to the 1st Squadron in 1972.[3] Her squadron assignment after 1983 is unknown.
Her patrols in the Mediterranean and Baltic seas from 1986 to 1988 are classified.[4]
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Decommissioning and fate
Onslaught was paid off in 1990, and broken up at Aliaga, Turkey in 1991.[5]
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