HMS Otus (S18)
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HMS ''Otus'' was a
Royal Navy The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
launched in 1962. She was decommissioned in the early 1990s and is now a
museum ship A museum ship, also called a memorial ship, is a ship that has been preserved and converted into a museum open to the public for educational or memorial purposes. Some are also used for training and recruitment purposes, mostly for the small numb ...
in Germany.


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 A submarine hull has two major components, the ''superstructure'' and the ''pressure hull''. The external portion of a submarine’s hull—that part that does not resist sea pressure and is free-flooding—is known as the “superstructure” i ...
. As designed for British service, the ''Oberon''-class submarines were in length
between perpendiculars Length between perpendiculars (often abbreviated as p/p, p.p., pp, LPP, LBP or Length BPP) is the length of a ship along the summer load line from the forward surface of the stem, or main bow perpendicular member, to the after surface of the ster ...
and in
length overall Length overall (LOA, o/a, o.a. or oa) is the maximum length of a vessel's hull measured parallel to the waterline. This length is important while docking the ship. It is the most commonly used way of expressing the size of a ship, and is also ...
, with a beam of , and a draught of . 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 VTS diesel generators, and two electric motors, each driving a 3-bladed propeller at up to 400 rpm. Top speed was when submerged, and on the surface. Eight 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. ''Otus'' was laid down by
Scotts Shipbuilding and Engineering Company Scotts Shipbuilding and Engineering Company Limited, often referred to simply as Scotts, was a Scottish shipbuilding company based in Greenock on the River Clyde. In its time in Greenock, Scotts built over 1,250 ships. History John Scott f ...
on 31 May 1961, and launched on 17 October 1962.
Sea trials A sea trial or trial trip is the testing phase of a watercraft (including boats, ships, and submarines). It is also referred to as a " shakedown cruise" by many naval personnel. It is usually the last phase of construction and takes place on o ...
were undertaken in Scottish waters, mainly
Loch Long Loch Long is a body of water in the council area of Argyll and Bute, Scotland. The sea loch extends from the Firth of Clyde at its southwestern end, to the Arrochar Alps at the head of the loch. It measures approximately in length, with a wi ...
and
Loch Fyne Loch Fyne (, ; meaning "Loch of the Vine/Wine"), is a sea loch off the Firth of Clyde and forms part of the coast of the Cowal, Cowal Peninsula. Located on the west coast of Argyll and Bute, west of Scotland. It extends inland from the Sound o ...
. The boat was commissioned into the Royal Navy on 5 October 1963.


Operational history

The first commission of ''Otus'' included large-scale missile trial exercises in the Atlantic Ocean and visits to the United States and
Halifax, Nova Scotia Halifax is the capital and most populous municipality of the Provinces and territories of Canada, Canadian province of Nova Scotia, and the most populous municipality in Atlantic Canada. As of 2024, it is estimated that the population of the H ...
, Canada. ''Otus'' attended the 1977 Silver Jubilee Fleet Review off
Spithead Spithead is an eastern area of the Solent and a roadstead for vessels off Gilkicker Point in Hampshire, England. It is protected from all winds except those from the southeast, with the Isle of Wight lying to the south-west. Spithead and the ch ...
when she was part of the Submarine Flotilla. In July 1987, a team of British, Commonwealth and international submariners took part in trials in Bjornafjorden, near Bergen, Norway, aboard ''Otus''. They ran a series of progressively deeper escapes, starting at . At , individuals started to drop out. At the end of the trials two submariners reached a depth of . This set a new world record which to date has not been broken. Of the two record breakers, the first (WO. Norman Cook MBE, the commander of the Submarine Escape Training Tower at ) was a regular ascent under control. The second, a petty officer instructor (PO. Hamish Jones BEM) from the Submarine Escape Training Tower, suffered an emergency release having given the alarm signal whilst flooding up the chamber. It was considered safer and quicker to escape him rather than depressurise and drain down. Both escapees suffered no lasting effects and returned to normal service. Both received military honours of the British Empire in the following years for this act. ''Otus'' was deployed to the
Persian Gulf The Persian Gulf, sometimes called the Arabian Gulf, is a Mediterranean seas, mediterranean sea in West Asia. The body of water is an extension of the Arabian Sea and the larger Indian Ocean located between Iran and the Arabian Peninsula.Un ...
during the 1991
Gulf War , combatant2 = , commander1 = , commander2 = , strength1 = Over 950,000 soldiers3,113 tanks1,800 aircraft2,200 artillery systems , page = https://www.govinfo.gov/content/pkg/GAOREPORTS-PEMD-96- ...
under Operation Granby. On her return to Gosport, she was flying a Jolly Roger; the only indication that the submarine had been involved in deploying and recovering
Special Air Service The Special Air Service (SAS) is a special forces unit of the British Army. It was founded as a regiment in 1941 by David Stirling, and in 1950 it was reconstituted as a corps. The unit specialises in a number of roles including counter-terr ...
and
Special Boat Service The Special Boat Service (SBS) is the special forces unit of the United Kingdom's Royal Navy. The SBS can trace its origins back to the Second World War when the Army Special Boat Section was formed in 1940. After the Second World War, the Roy ...
personnel.


Decommissioning and museum

''Otus'' was decommissioned in the early 1990s and resided at Pound's scrapyard in Portsmouth for several years. She was later purchased by a German entrepreneur, who moored her in the harbour of the town of
Sassnitz Sassnitz (, before 1993 in ) is a town on the Jasmund peninsula, Rügen Island, in the state of Mecklenburg-Vorpommern, Germany. The population as of 2012 was 9,498. Sassnitz is a well-known seaside resort and port town, and is a gateway to th ...
on the island of
Rügen Rügen (; Rani: ''Rȯjana'', ''Rāna''; , ) is Germany's largest island. It is located off the Pomeranian coast in the Baltic Sea and belongs to the state of Mecklenburg-Western Pomerania. The "gateway" to Rügen island is the Hanseatic ci ...
in Germany to act as a floating
museum ship A museum ship, also called a memorial ship, is a ship that has been preserved and converted into a museum open to the public for educational or memorial purposes. Some are also used for training and recruitment purposes, mostly for the small numb ...
.


References


Publications

* {{DEFAULTSORT:Otus (S18) Oberon-class submarines of the Royal Navy Ships built on the River Clyde 1962 ships Cold War submarines of the United Kingdom Museum ships in Germany