An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-breaking ships, it may also refer to smaller vessels, such as the icebreaking boats that were once used on the canals of the United Kingdom.
A dock landing ship is an amphibious warfare ship with a well dock to transport and launch landing craft and amphibious vehicles. Some ships with well decks, such as the Soviet Ivan Rogov class, also have bow doors to enable them to deliver vehicles directly onto a beach. Modern dock landing ships also operate helicopters.
Skjold-class corvettes are a class of six light, superfast, stealth missile corvettes in service with the Royal Norwegian Navy. The boats were formerly classed as MTBs but, from 2009, the Royal Norwegian Navy has described them as corvettes (korvett) because their seaworthiness is seen as comparable to corvettes, and because they do not carry torpedoes. They were built at the Umoe Mandal yard. With a maximum speed of 60 knots (110 km/h), the Skjold-class corvettes were the fastest combat ships afloat at the time of their introduction.
A deep-submergence vehicle (DSV) is a deep-diving crewed submersible that is self-propelled. Several navies operate vehicles that can be accurately described as DSVs. DSVs are commonly divided into two types: research DSVs, which are used for exploration and surveying, and DSRVs, which can be used for rescuing the crew of a sunken navy submarine, clandestine (espionage) missions, or both. DSRVs are equipped with docking chambers to allow personnel ingress and egress via a manhole.
A Small Waterplane Area Twin Hull, better known by the acronym SWATH, is a twin-hull ship design that minimizes hull cross section area at the sea's surface. Minimizing the ship's volume near the surface area of the sea, where wave energy is located, maximizes a vessel's stability, even in high seas and at high speeds. The bulk of the displacement necessary to keep the ship afloat is located beneath the waves, where it is less affected by wave action. Wave excitation drops exponentially as depth increases, so wave action normally does not affect a submerged submarine at all. Placing the majority of a ship's displacement under the waves is similar in concept to creating a ship that rides atop twin submarines.
Sea Shadow (IX-529) was an experimental stealth ship built by Lockheed for the United States Navy to determine how a low radar profile might be achieved and to test high stability hull configurations that have been used in oceanographic ships.
A research vessel is a ship or boat designed, modified, or equipped to carry out research at sea. Research vessels carry out a number of roles. Some of these roles can be combined into a single vessel but others require a dedicated vessel. Due to the demanding nature of the work, research vessels are often constructed around an icebreaker hull, allowing them to operate in polar waters.
The nuclear-powered Project 949A Antey submarine Kursk sank in an accident on 12 August 2000 in the Barents Sea, during the first major Russian naval exercise in more than 10 years, and all 118 personnel on board were killed. The crews of nearby ships felt the initial explosion and a second, much larger, explosion, but the Russian Navy did not realise that an accident had occurred and did not initiate a search for the sub for more than six hours. Because the submarine's emergency rescue buoy had been intentionally disabled during an earlier mission, more than 16 hours were needed to locate the sunken boat.
Technical research ships were used by the United States Navy during the 1960s to gather intelligence by monitoring, recording and analyzing wireless electronic communications of nations in various parts of the world. At the time these ships were active, the mission of the ships was covert and discussion of the true mission was prohibited. The mission of the ships was publicly given as conducting research into atmospheric and communications phenomena. However, the true mission was more or less an open secret and the ships were commonly referred to as "spy ships".
A spy ship or reconnaissance vessel is a dedicated ship intended to gather intelligence, usually by means of sophisticated electronic eavesdropping. In a wider sense, any ship intended to gather information could be considered a spy ship.
The People's Liberation Army Navy Surface Force is the surface warfare branch of China's People's Liberation Army Navy (PLAN), consisting of all surface vessels in operational service with the PLAN. The PLAN Surface Force operates 661 ships organized into three fleets: the North Sea Fleet, the East Sea Fleet and the South Sea Fleet.
The Norwegian Intelligence Service (NIS) or Etterretningstjenesten (E-tjenesten) is a Norwegian military intelligence agency under the Chief of Defence and the Ministry of Defence.
Prevail (IX-537) is a modified Stalwart-class auxiliary general ocean surveillance ship (AGOS) of the United States Navy previously operated by the U.S. Military Sealift Command as T-AGOS 8. Prevail was reclassified as Unclassified Miscellaneous (IX) in October 2003 and is unofficially referred to as TSV-1. In this context, TSV stands for Training Support Vessel, and should not be confused with the U.S. Army's USAV Spearhead Theater Support Vessel initiative.
Signals intelligence by alliances nations and industries, many organizations, national or not, are responsible for communications security as well as SIGINT; the organization makes codes and ciphers that it hopes opponents cannot break. There is a synergy between the two components; there is a saying among cryptologists that no one is qualified to create a cipher unless they have successfully cryptanalyzed a cipher of equivalent complexity.
Salvage diving is the diving work associated with the recovery of all or part of ships, their cargoes, aircraft, and other vehicles and structures which have sunk or fallen into water. In the case of ships it may also refer to repair work done to make an abandoned or distressed but still floating vessel more suitable for towing or propulsion under its own power. The recreational/technical activity known as wreck diving is generally not considered salvage work, though some recovery of artifacts may be done by recreational divers.
The Primor'ye class are a group of spy ships built for the Soviet Navy. Two ships are operated by the Russian Navy. The Soviet designation was Project 394B.
FS Marjata is a Norwegian purpose-built electronic intelligence collection vessel (ELINT), which was ordered by the parliament in 2010. It was baptized on 6 December 2014 by Prime Minister Erna Solberg. The ship is manned by crew from the Norwegian Intelligence Service.
Several Norwegian government vessels have been named FS Marjata:
The Multi-Role Ocean Surveillance Ship (MROSS) is a research and surveillance ship currently in development for the United Kingdom's Royal Navy. When it enters service in 2024, it will be used by the Royal Navy to research and protect critical undersea national infrastructure, such as undersea cables and gas pipelines, in both British and international waters.
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