HMS Onyx (S21)
HMS Onyx (s21)
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| History | |
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 United Kingdom
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| Name: | HMS Onyx |
| Builder: | Cammell Laird, Birkenhead |
| Laid down: | 16 November 1964 |
| Launched: | 18 August 1966 |
| Commissioned: | 20 November 1967 |
| Decommissioned: | 1991 |
| Motto: |
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| Fate: | Scrapped May 2014 |
| General characteristics as designed | |
| Class and type: | Oberon class |
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| Beam: | 26.5 feet (8.1 m) |
| Draught: | 18 feet (5.5 m) |
| Propulsion: |
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| Speed: |
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| Complement: | 68 (6 officers, 62 enlisted) |
| Sensors and processing systems: |
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| Armament: |
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HMS Onyx was an Oberon class submarine of the Royal Navy.
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.
Onyx was laid down by Cammel Laird on 16 November 1964, and launched on 18 August 1966. The boat was commissioned into the Royal Navy on 20 November 1967.Onyx was ordered after a previous Oberon-class submarine of the same name (laid down by Chatham Dockyard in 1962) was transferred to the Royal Canadian Navy as HMCS Ojibwa before launching in February 1964. The submarine's motto, "Taurus excreta cerebrum vincit," is correctly translated as "Bullshit conquers brains".
The first commission of Onyx saw her visit Swansea in South Wales for the investiture of His Royal Highness The Prince of Wales. She also attended the bicentennial celebrations of the United States of America in 1976.
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Wikipedia