Please answer the following question: Information: - Toralf Westermoen (July 5, 1914 May 6, 1986) was a pioneer for the development of high speed craft in Norway. Westermoen was involved in the companies "Batservice Verft", " Westermoen Batbyggeri og Mek. Verksted ", " Westermoen Hydrofoil " and " Westamarin ", all situated in Mandal. - A minehunter is a naval vessel that actively detects and destroys individual naval mines. Minesweepers, on the other hand, clear mined areas as a whole, without prior detection of mines. A vessel that combines both of these roles is known as a mine countermeasures vessel (MCMV). - Cochin Shipyard A shipyard (also called a dockyard) is a place where ships are repaired and built. These can be yachts, military vessels, cruise liners or other cargo or passenger ships. Dockyards are sometimes more associated with maintenance and basing activities than shipyards, which are sometimes associated more with initial construction. The terms are routinely used interchangeably, in part because the evolution of dockyards and shipyards has often caused them to change or merge roles. - Risr is famous for its tourist attractions such as the wooden boat festival which is staged during the first week of August every year. It also has a growing reputation as the regional capital of arts and crafts, which culminates in the "Villvin-festival" during the summer holiday. - A frigate is any of several types of warship, the term having been used for ships of various sizes and roles over the last few centuries. - Norway (; Norwegian: (Bokmal) or (Nynorsk); Sami: "Norgga"), officially the Kingdom of Norway, is a sovereign and unitary monarchy whose territory comprises the western portion of the Scandinavian Peninsula plus the island Jan Mayen and the archipelago of Svalbard. The Antarctic Peter I Island and the sub-Antarctic Bouvet Island are dependent territories and thus not considered part of the Kingdom. Norway also lays claim to a section of Antarctica known as Queen Maud Land. Until 1814, the Kingdom included the Faroe Islands (since 1035), Greenland (1261), and Iceland (1262). It also included Shetland and Orkney until 1468. It also included the following provinces, now in Sweden: Jamtland, Harjedalen and Bohuslan. - A/S Westermoen Batbyggeri og Mek Verksted was a shipyard located in Mandal, Norway, who specialized in high speed craft. Under the leadership of Toralf Westermoen in the 1950s, the yard has produced a long range of high speed boat types, such as: - A mine countermeasures vessel or MCMV is a type of naval ship designed for the location of and destruction of naval mines which combines the role of a minesweeper and minehunter in one hull. The term MCMV is also applied collectively to minehunters and minesweepers. - The Royal Norwegian Navy (Norwegian: Sjforsvaret, "the naval defence (forces)") is the branch of the Norwegian Armed Forces responsible for naval operations of the state of Norway. , the RNoN consists of approximately 3,700 personnel (9,450 in mobilized state, 32,000 when fully mobilized) and 70 vessels, including 5 heavy frigates, 6 submarines, 14 patrol boats, 4 minesweepers, 4 minehunters, 1 mine detection vessel, 4 support vessels and 2 training vessels. The navy also includes the Coast Guard. - The Sauda class was a class of nine minesweepers and one minehunter in service for the Royal Norwegian Navy from 1953 to 1996 . The class was designed at Sparkman & Stephens Inc. , New York , as an improvement of the NYMS class ( Norwegian Yard Mine Sweepers ) . Five of the vessels were built in the United States , three were built at Westermoen Batbyggeri og Mek Verksted in Mandal , one at Skaalurens Skibsbyggeri in Rosendal and one at De Forenede Batbyggerier in Risr . The class was fully financed by the US government as a part of the Military Assistance Program ( MAP ) . Most of the vessels were named after Norwegian rivers : Sira , Tana , Alta , Ogna , Vosso , Glomma , Tista , Kvina and Utla . Sauda is however a town , not a river . Alta is the only vessel still in existence . She is a museum vessel owned by the Royal Norwegian Navy Museum but maintained and sailed by a dedicated friendship association . Some of the vessels were in service in the United States Navy and the Royal Belgian Navy before entering Norwegian service . - A patrol boat is a relatively small naval vessel generally designed for coastal defence duties. There have been many designs for patrol boats. They may be operated by a nation's navy, coast guard, police force or customs and may be intended for marine (blue water) and/or estuarine or river ("brown water") environments. They are commonly found engaged in various border protection roles, including anti-smuggling, anti-piracy, fisheries patrols, and immigration law enforcement. They are also often called upon to participate in rescue operations. Vessels of this type include the original yacht (from Dutch/Low German "jacht" meaning hunting or hunt), a light, fast-sailing vessel used by the Dutch navy to pursue pirates and other transgressors around and into shallow waters. - A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term most commonly refers to a large, crewed vessel. It is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub. Used as an adjective in phrases such as "submarine cable", "submarine" means "under the sea". The noun "submarine" evolved as a shortened form of "submarine boat" (and is often further shortened to "sub"). For reasons of naval tradition, submarines are usually referred to as "boats" rather than as "ships", regardless of their size. - A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, an enemy vessel. Naval mines can be used offensivelyto hamper enemy shipping movements or lock vessels into a harbour; or defensivelyto protect friendly vessels and create "safe" zones. - The Norwegian Armed Forces ("The Defence") is the military organisation responsible for the defence of Norway. It consists of five branches, the Norwegian Army, the Royal Norwegian Navy, which includes the Coast Guard, the Royal Norwegian Air Force, the Home Guard and the Cyber Force, as well as several joint departments. The armed forces number 23,000 personnel, including civilian employees, and have a full-mobilisation combat strength of 83,000. Given the information, choose the subject and object entities that have the relation of 'subclass of'.
A:
sauda-class mine countermeasures vessel , mine countermeasures vessel