HMS Onslaught (S14)
Template:Short description Template:Other ships
Template:Use dmy dates Template:Use British English
Template:Infobox ship imageTemplate:Infobox ship careerTemplate:Infobox ship characteristicsHMS Onslaught was a British Template:Sclass attack submarine operated by the Royal Navy.
Design and construction
Template:Main 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.<ref>Template:Cite book</ref>
As designed for British service, the Oberon-class submarines were Template:Convert in length between perpendiculars and Template:Convert in length overall, with a beam of Template:Convert, and a draught of Template:Convert.<ref name=Moore490>Template:Cite book</ref> Displacement was 1,610 tons standard, 2,030 tons full load when surfaced, and 2,410 tons full load when submerged.<ref name=Moore490/> Propulsion machinery consisted of 2 Admiralty Standard Range 16 VMS diesel generators, and two Template:Convert electric motors, each driving a Template:Convert, 3-bladed propeller at up to 400 rpm.<ref name=Moore490/> Top speed was Template:Convert when submerged, and Template:Convert on the surface.<ref name=Moore490/> Eight Template:Convert diameter torpedo tubes were fitted (six facing forward, two aft), with a total payload of 24 torpedoes.<ref name=Moore490/> The boats were fitted with Type 186 and Type 187 sonars, and an I-band surface search radar.<ref name=Moore490/> The standard complement was 68: 6 officers, 62 sailors.<ref name=Moore490/>
Onslaught was laid down by Chatham Dockyard on 8 April 1959, and launched on 24 September 1960.<ref name=Moore490/> The boat was commissioned into the Royal Navy on 14 August 1962.<ref name=Moore490/>
Operational history
Template:Expand section 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.<ref>Template:Cite web</ref> Her squadron assignment after 1983 is unknown.
Her patrols in the Mediterranean and Baltic seas from 1986 to 1988 are classified.<ref>Template:Cite news</ref>
Decommissioning and fate
Onslaught was paid off in 1990, and broken up at Aliaga, Turkey in 1991.<ref>Template:Cite web</ref>