HMS ''Otus'' was a

Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against F ...

submarine A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...

launched in 1962. She was decommissioned in the early 1990s and is now a naval museum 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 ''light hull'' and the ''pressure hull''. The light hull (''casing'' in British usage) of a submarine is the outer non-watertight hull which provides a hydrodynamically efficient shape. The pressure ...

. 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 stern ...

and in

length overall __NOTOC__ 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, an ...

, 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 fou ...

on 31 May 1961, and launched on 17 October 1962.

Sea trials A sea trial 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 open water, and i ...

were undertaken in Scottish waters, mainly

Loch Long Loch Long is a body of water in Argyll and Bute, Scotland. The Sea Loch extends from the Firth of Clyde at its southwestern end. It measures approximately in length, with a width of between . The loch also has an arm, Loch Goil, on its weste ...

and

Loch Fyne Loch Fyne ( gd, Loch Fìne, ; meaning "Loch of the Vine/Wine"), is a sea loch off the Firth of Clyde and forms part of the coast of the Cowal peninsula. Located on the west coast of Argyll and Bute, 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 The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

and visits to the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

and Halifax,

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

. ''Otus'' attended the 1977 Silver Jubilee

Fleet Review A fleet review or naval review is an event where a gathering of ships from a particular navy is paraded and reviewed by an incumbent head of state and/or other official civilian and military dignitaries. A number of national navies continue to ...

off

Spithead Spithead is an area of the Solent and a roadstead off Gilkicker Point in Hampshire, England. It is protected from all winds except those from the southeast. It receives its name from the Spit, a sandbank stretching south from the Hampshire ...

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 (the commander of the Submarine Escape Training Tower at HMS ''Dolphin'') was a regular ascent under control. The second, a petty officer instructor 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 ( fa, خلیج فارس, translit=xalij-e fârs, lit=Gulf of Persis, Fars, ), sometimes called the ( ar, اَلْخَلِيْجُ ٱلْعَرَبِيُّ, Al-Khalīj al-ˁArabī), is a Mediterranean sea (oceanography), me ...

during the 1991

Gulf War The Gulf War was a 1990–1991 armed campaign waged by a 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Iraq were carried out in two key phases: ...

under

Operation Granby Operation Granby, commonly abbreviated Op Granby, was the code name given to the British military operations during the 1991 Gulf War. 53,462 members of the British Armed Forces were deployed during the conflict. The total cost of operations wa ...

. 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-terro ...

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 Roya ...

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 german: Saßnitz) 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 ...

on the island of

Rügen Rügen (; la, Rugia, ) 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 city of Stralsund, where ...

in Germany to act as a floating naval museum.

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