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Visby Class Corvette
The ''Visby'' class is a warship in use by the Swedish Navy. It is the latest class of corvette adopted by the navy after the and corvettes. Its design emphasizes low visibility radar cross-section and Infrared homing, infrared signature, and the class has received widespread international attention because of its capabilities as a stealth ship. The first ship in the class is named after Visby, the main city on the island of Gotland. The ''Visby'' ships are designed by Swedish Defence Materiel Administration (FMV) and built by Kockums AB, Saab Kockums AB in Karlskrona. The first ship of the class was launched in 2000, but production then suffered repeated delays. The fifth and last ship was delivered in 2015. In 2021, an order was placed for the development of a second generation of evolved ''Visby'' corvettes. Design The hull is constructed with a sandwich design consisting of a PVC core with a carbon fibre and Polyvinyl chloride, vinyl laminate (see also the Oceanic-Cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
K32 HMS Helsingborg Anchored-of-Gotska-Sandoen Cropped
K3 may refer to: Transportation * China Railway K3/4 * K-3 (Kansas highway), a state highway in Kansas * London Buses route K3, London Bus route K3 * Taquan Air, an Alaskan commuter airline (by IATA code) * K-3 cart * Kia Forte, sold as Kia K3 in South Korea * LNER Class K3, a steam locomotive * GSWRI Class K3, a Great Southern and Western Railway (Ireland) steam locomotive Military ;Units * Life Regiment Hussars, Swedish cavalry regiment ;Weapons * K-3 (rifle), an Armenian-made bullpup rifle * Daewoo K3, a light machine gun ;Ships * Soviet submarine K-3 Leninsky Komsomol, Soviet submarine K-3 ''Leninsky Komsomol'', the first Soviet nuclear submarine * , a 1914 United States Navy K-class submarine * , a 1916 British K-class submarine * , a 1940 Royal Navy ''Flower''-class corvette ;Airfields * Pohang Airport, by United States Air Force designator during the Korean War Science, technology, computing and mathematics * The Kleene logic K3 * A version of the K (programming languag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sonar
Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on or under the surface of the water, such as other vessels. "Sonar" can refer to one of two types of technology: ''passive'' sonar means listening for the sound made by vessels; ''active'' sonar means emitting pulses of sounds and listening for echoes. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used for robot navigation, and SODAR (an upward-looking in-air sonar) is used for atmospheric investigations. The term ''sonar'' is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low (infrasonic) to extr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface-to-air Missile
A surface-to-air missile (SAM), also known as a ground-to-air missile (GTAM) or surface-to-air guided weapon (SAGW), is a missile designed to be launched from the ground to destroy aircraft or other missiles. It is one type of anti-aircraft system; in modern armed forces, missiles have replaced most other forms of dedicated anti-aircraft weapons, with anti-aircraft guns pushed into specialized roles. The first attempt at SAM development took place during World War II, but no operational systems were introduced. Further development in the 1940s and 1950s led to operational systems being introduced by most major forces during the second half of the 1950s. Smaller systems, suitable for close-range work, evolved through the 1960s and 1970s, to modern systems that are man-portable. Shipborne systems followed the evolution of land-based models, starting with long-range weapons and steadily evolving toward smaller designs to provide a layered defence. This evolution of design increasin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umkhonto (missile)
The Umkhonto (Xhosa language, Xhosa: Spear) is a family of Vertical launching system, vertical launch system, Surface-to-air missile, surface-to-air missiles developed by Denel Dynamics. Umkhonto is designed to be a modern, short to medium-range missile, with an all-weather launch capability. Operating at supersonic speeds, the Umkhonto utilises infrared homing technology to provide point and limited local air defence against multiple attacks of aircraft and missiles. Denel initially developed the Umkhonto to equip the four Valour-class frigate, Valour-class frigates of the South African Navy with an anti-air capability, with the first successful naval launch achieved in 2005 from SAS Amatola, SAS ''Amatola''. The South African Army has also invested in the project as part of a programme to replace the obsolete, and now retired, 122 Squadron SAAF, Cactus mobile short-ranged ground-based air defence system. The Umkhonto has secured notable export success, with the missile currentl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-submarine Weapon
An anti-submarine weapon (ASW) is any one of a number of devices that are intended to act against a submarine and its crew, to destroy (sink) the vessel or reduce its capability as a weapon of war. In its simplest sense, an anti-submarine weapon is usually a projectile, missile or bomb that is optimized to destroy submarines. History Before World War I Prior to about 1890, naval weapons were only used against surface shipping. With the rise of the military submarine after this time, countermeasures were considered for use against them. The first submarine installation of torpedo tubes was in 1885 and the first ship was sunk by a submarine-launched torpedo in 1887. There were only two ways of countering the military submarine initially: ramming them or sinking them with gunfire. However, once they were submerged, they were largely immune until they had to surface again. By the start of the First World War there were nearly 300 submarines in service with another 80 in production ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Depth Charge
A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive hydraulic shock. Most depth charges use high explosive charges and a fuze set to detonate the charge, typically at a specific depth. Depth charges can be dropped by ships, patrol aircraft, and helicopters. Depth charges were developed during World War I, and were one of the first viable methods of attacking a submarine underwater. They were widely used in World War I and World War II, and remained part of the anti-submarine arsenals of many navies during the Cold War, during which they were supplemented, and later largely replaced, by anti-submarine homing torpedoes. A depth charge fitted with a nuclear warhead is also known as a " nuclear depth bomb". These were designed to be dropped from a patrol plane or deployed by an anti-submarine missile from a surface ship, or anot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Mine
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, any vessel or a particular vessel type, akin to anti-infantry vs. anti-vehicle mines. Naval mines can be used offensively, to hamper enemy shipping movements or lock vessels into a harbour; or defensively, to protect friendly vessels and create "safe" zones. Mines allow the minelaying force commander to concentrate warships or defensive assets in mine-free areas giving the adversary three choices: undertake an expensive and time-consuming minesweeping effort, accept the casualties of challenging the minefield, or use the unmined waters where the greatest concentration of enemy firepower will be encountered. Although international law requires signatory nations to declare mined areas, precise locations remain secret; and non-complying individ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torped 45
The Torped 45 is a lightweight torpedo intended for ASW and surface targets, providing multiple-target active/passive homing combined with wire guidance. It is designed and manufactured by Saab Dynamics. It was designed for the Swedish Navy, based on the experience gathered from the well proven 43-series of torpedoes. Torpedo 45 can be launched from a variety of platforms including stationary, surface vessels, submarines and helicopters. It was specifically designed to operate against shallow-water targets and surface vessels. It is controlled using wire guidance and has a hydro-acoustic homing system for the final phase. The torpedo has features that are unique for lightweight torpedoes. * It combines wire guidance and homing control * It can be launched from submarines, surface vessels and helicopters * It can be wire-guided from a flying or hovering helicopter (no parachute necessary) * Its warhead has a main charge large enough to take out any conventional submarine or seriou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torpedo Tube
A torpedo tube is a cylindrical device for launching torpedoes. There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboard surface vessels. Deck-mounted torpedo launchers are usually designed for a specific type of torpedo, while submarine torpedo tubes are general-purpose launchers, and are often also capable of deploying mines and cruise missiles. Most modern launchers are standardized on a diameter for light torpedoes (deck mounted aboard ship) or a diameter for heavy torpedoes (underwater tubes), although other sizes of torpedo tube have been used: see Torpedo classes and diameters. Submarine torpedo tube A submarine torpedo tube is a more complex mechanism than a torpedo tube on a surface ship, because the tube has to accomplish the function of moving the torpedo from the normal atmospheric pressure within the submarine into the sea at the ambient ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-ship Missile
An anti-ship missile (AShM) is a guided missile that is designed for use against ships and large boats. Most anti-ship missiles are of the sea skimming variety, and many use a combination of inertial guidance and active radar homing. A good number of other anti-ship missiles use infrared homing to follow the heat that is emitted by a ship; it is also possible for anti-ship missiles to be guided by radio command all the way. The first anti-ship missiles, which were developed and built by Nazi Germany, used radio command guidance.https://airandspace.si.edu/collection-objects/bomb-guided-fritz-x-x-1/nasm_A19840794000#:~:text=The%20Fritz%20X%2C%20also%20known,the%20Henschel%20Hs%20293%20missile. These saw some success in the Mediterranean Theatre during 1943–44, sinking or heavily damaging at least 31 ships with the Henschel Hs 293 and more than seven with the '' Fritz X'', including the Italian battleship ''Roma'' and the light cruiser . A variant of the HS 293 had a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RBS15
The RBS 15 (Robotsystem 15) is a long-range fire-and-forget surface-to-surface and air-to-surface anti-ship missile. The later version Mk. III has the ability to attack land targets as well. The missile was developed by the Swedish company Saab Bofors Dynamics. History The Swedish Navy earlier made the RB 08 anti-ship missiles with the Halland-class destroyers in the early 1960s. The main effect of Sweden's defence resolution of 1958 for the Swedish navy was restructuring into a lighter force consisting of fast attack craft (FAC) vessels and a halt to destroyer procurement. This posed a problem as the existing RB 08 missile required launch rails and a missile magazine in the destroyers, taking up space that was not available in smaller ships. Adding to the problems, each missile had to be individually prepared for launch and only two missiles could be on the launch rails at the same time. In comparison, the P-15 Termit (NATO codename Styx) missile used by the Soviet Union ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bofors 57 Mm L/70 Naval Artillery Gun
Bofors 57 mm Naval Automatic Gun L/70 ( sv, 57 mm sjöautomatkanon L/70 (''57 mm SAK 70'')), among other names (see Names), is a series of dual-purpose naval guns designed and produced by the Swedish arms manufacturer AB Bofors (since March 2005 part of BAE Systems AB), designed in the late 1960s as a replacement design for the twin barreled Bofors 57 mm Naval Automatic Gun L/60. The gun is remotely controlled by a fire-control computer but can as a redundancy measure also be operated manually by crew using instrument panels either on or in direct contact with the gun. The gun has been upgraded and improved several times: *Mk1 – The baseline Mark 1 variant began production in 1970 and was initially used to equip smaller coastal patrol craft and fast attack craft. *Mk2 – The improved Mark 2 variant came in 1981 and drastically lowered the weight as well as introduced new servo stabilizers. *Mk3 – The improved Mark 3 variant came in 1995 and primarily features t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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