Name Onslaught Commissioned 14 August 1962 Identification pennant number S14 Draft 5.5 m Launched 24 September 1960 Builders Chatham Dockyard, England | Laid down 8 April 1959 Decommissioned 1990 Class and type Oberon-class submarine Construction started 8 April 1959 Beam 8.08 m | |
HMS Onslaught was a British Oberon-class submarine operated by the Royal Navy.
Contents
Design and construction
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.
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). Displacement was 1,610 tons standard, 2,030 tons full load when surfaced, and 2,410 tons full load when submerged. 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 feet (2.1 m) 3-bladed propeller at up to 400 rpm. Top speed was 17 knots (31 km/h; 20 mph) when submerged, and 12 knots (22 km/h; 14 mph) on the surface. Eight 21-inch (530 mm) diameter torpedo tubes were fitted (six facing forward, two aft), with a total payload of 24 torpedoes. The boats were fitted with Type 186 and Type 187 sonars, and an I-band surface search radar. The standard complement was 68: 6 officers, 62 sailors.
Onslaught was laid down by Chatham Dockyard on 8 April 1959, and launched on 24 September 1960. The boat was commissioned into the Royal Navy on 14 August 1962.
Operational history
Her patrols in the Mediterranean and Baltic from 1986 to 1988 are classified.
Decommissioning and fate
Onslaught was paid off in 1990.