Van Speijk-class Frigate
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Van Speijk-class Frigate
The ''Van Speijk''-class frigates were built for the Royal Netherlands Navy in the 1960s. They were versions of the British s with Dutch radars. The British design was chosen in order to enable rapid construction in order to replace elderly destroyer escorts and take up part of the NATO patrol duties of the decommissioned anti-submarine warfare carrier . The ships were modernised in the late 1970s. All six ships were sold to the Indonesian Navy in 1986–1989 and five are still in service as the s. Dutch modifications For the most part the Dutch limited their changes to the ''Leander'' design to a wholesale replacement of the original British electronics and electrical equipment by those from Dutch manufacturers. Hollandse Signaalapparaten supplied the entire electronics suite. Specifically their LW-02 long-range air-surveillance radar, the DA-02 medium-range air/surface search radar and the M45 combined radar and optical fire control system for the guns. The Dutch HSA M44 radar/ ...
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Nederlandsche Dok En Scheepsbouw Maatschappij
The Nederlandsche Dok en Scheepsbouw Maatschappij (NDSM) (Dutch: ''Netherlands dock and shipbuilding company''), was a shipbuilding and repair company based in Amsterdam in the Netherlands, existing from 1946 to 1979. The area of about 80 hectares has since 2013 been transformed into a modern city district as a distinct part of Amsterdam-Noord and is still under development. The industrial wharfs and structures have been replaced by apartment buildings and hospitality industry, still called NDSM. Foundation Partnership turned into Public Company The company came into existence as a general partnership named Nederlandsche Dok en Scheepsbouw Maatschappij (NDSM), founded by Nederlandsche Scheepsbouw Maatschappij (NSM) and Nederlandsche Dok Maatschappij (NDM) both from Amsterdam. On 27 February 1946 this partnership was confirmed by the shareholders of both companies. The partnership would soon be turned into the public company NDSM NV. All assets would be handed to NDSM, and staf ...
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Anti-submarine Warfare Carrier
An anti-submarine warfare carrier (ASW carrier) (US hull classification symbol CVS) is a type of small aircraft carrier whose primary role is as the nucleus of an anti-submarine warfare hunter-killer group. This type of ship came into existence during the Cold War as a development of the escort carriers used in the ASW role in the North Atlantic during World War II. Role After World War II, the main naval threat to most Western nations was confrontation with the Soviet Union. The Soviets ended the war with a small navy and took the route of asymmetric confrontation against Western surface ship superiority by investing heavily in submarines both for attack and later fielding submarine-launched missiles. Several nations who purchased British and US surplus light carriers were most easily able to accommodate slow-moving, less expensive, and easy-to-land anti-submarine aircraft from the 1960s forward, such as the S-2 Tracker, which flew from the decks of US, Canadian, Australi ...
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Karel Satsuit Tubun
Karel Satsuit Tubun (also written as Karel Sadsuitubun; 14 October 1928 – 1 October 1965) was an Indonesian police officer and national hero. A bodyguard for deputy prime minister Johannes Leimena, he was killed while on duty in a scuffle by communists during the 1965 coup d'état. Karel Satsuit Tubun was born in Tual, Southeast Maluku, on 14 October 1928. He became a police officer, participating in Operation Trikora, and after the transfer of West Irian, he became a bodyguard for deputy prime minister Johannes Leimena. As a bodyguard, he was promoted to the rank of Police Brigadier. On 30 September 1965, communist rebels planned to kidnap and kill members of the armed forces in a coup d'état, including Major General Abdul Haris Nasution, who was in the house next to Leimena's. During the commotion, Tubun woke up and attempted to shoot the rebels. However, he was shot at, and died instantly. The coup d'état would fail, and in the aftermath, Tubun was declared a national h ...
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Ahmad Yani
General Ahmad Yani (19 June 1922 – 1 October 1965) was the Commander of the Indonesian Army, and was killed by members of the 30 September Movement during an attempt to kidnap him from his house. Early life Ahmad Yani was born in Jenar, Purworejo, Dutch East Indies on 19 June 1922 to the Wongsoredjo family, a family that worked at a sugar factory run by a Dutch owner. In 1927, Yani moved with his family to Batavia, where his father now worked for a Dutch General. At Batavia, Yani worked his way through primary and secondary education. In 1940, Yani left high school to undergo compulsory military service in the colonial government's Army of the Dutch East Indies, where he initially trained as a navy seaman. He studied military topography in Malang, East Java, but this education was interrupted by the Japanese invasion in 1942, at which time Yani and his family moved back to Central Java. In 1943, he joined the Japanese-sponsored PETA army, and underwent further training ...
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Yos Sudarso
Commodore Yosaphat "Yos" Sudarso (24 November 1925 – 15 January 1962) was an Indonesian naval officer killed at the Battle of Arafura Sea. At the time of his death, Yos Sudarso was deputy chief of staff of the Indonesian Navy and in charge of an action to infiltrate Dutch New Guinea. He was promoted to vice admiral ( id, Laksamana Madya) posthumously. The Battle near Vlakke Hoek (Etna Bay) of the Arafura Sea stopped an attempt by the Indonesian Navy to drop off 150 soldiers in Kaimana in Dutch New Guinea for sabotage and to incite the local population against the Dutch government. Sudarso was in charge of the operation at sea, while Colonel Murshid commanded the infiltrants. Three ''Jaguar''-class torpedo boats left the Aru Islands in the middle of the night but were intercepted by a Dutch reconnaissance plane, as the Dutch had anticipated the action for weeks. The torpedo boats responded to the flares sent off by the plane by shooting at it. The Dutch destroyer then joine ...
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Slamet Riyadi
Brigadier General Ignatius Slamet Rijadi (Perfected Spelling: Ignatius Slamet Riyadi; 26 July 1927 – 4 November 1950) was an Indonesian soldier. Rijadi was born in Surakarta, Central Java, to a soldier and a fruit seller. Rijadi was "Sold" to his uncle and renamed as a toddler to cure his illnesses, Rijadi was raised at his parents' home and studied at Dutch-run schools. After the Japanese occupation of the Dutch East Indies, Rijadi studied at a Japanese-run sailor's academy and worked for them upon graduation; he abandoned the Japanese army towards the end of World and assisted resistance operations for the rest of the occupation. After Indonesia's independence on 17 August 1945, Rijadi led Indonesian forces in the Surakarta area during the revolution against the returning Dutch. Starting with a guerrilla campaign, by 1947, when he fought against Dutch offensives in Ambarawa and Semarang, he was in charge of the 26th Regiment. During a second Dutch offensive, Rijad ...
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National Hero Of Indonesia
National Hero of Indonesia ( id, Pahlawan Nasional Indonesia) is the highest-level title awarded in Indonesia. It is posthumously given by the Government of Indonesia for actions which are deemed to be heroic, defined as "actual deeds which can be remembered and exemplified for all time by other citizens" or "extraordinary service furthering the interests of the state and people". The Ministry of Social Affairs gives seven criteria which an individual must fulfill, as follows: #Have been an Indonesian citizen who is deceased and, during his lifetime, led an armed struggle or produced a concept or product useful to the state; #Have continued the struggle throughout his life and performed above and beyond the call of duty; #Have had a wide-reaching impact through his actions; #Have shown a high degree of nationalism; #Have been of good moral standing and respectable character; #Never surrendered to his enemies; and #Never committed an act which taints his or her legacy. Nominations ...
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Variable Depth Sonar
A towed array sonar is a system of hydrophones towed behind a submarine or a surface ship on a cable. Trailing the hydrophones behind the vessel, on a cable that can be kilometers long, keeps the array's sensors away from the ship's own noise sources, greatly improving its signal-to-noise ratio, and hence the effectiveness of detecting and tracking faint contacts, such as quiet, low noise-emitting submarine threats, or seismic signals. A towed array offers superior resolution and range compared with hull mounted sonar. It also covers the baffles, the blind spot of hull mounted sonar. However, effective use of the system limits a vessel's speed and care must be taken to protect the cable from damage. History During World War I, a towed sonar array known as the "Electric Eel" was developed by Harvey Hayes, a U.S. Navy physicist. This system is believed to be the first towed sonar array design. It employed two cables, each with a dozen hydrophones attached. The project was discontin ...
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Limbo (weapon)
Limbo, or Anti Submarine Mortar Mark 10 (A/S Mk.10), was the final development of the forward-throwing anti-submarine weapon Squid, designed during the Second World War and was developed by the Admiralty Underwater Weapons Establishment in the 1950s. Limbo was installed on the quarterdeck of Royal Navy escort ships from 1955 to the mid-1980s, Australian–built destroyer and s. Limbo was widely employed by the Royal Canadian Navy, being incorporated into all destroyer designs from the late 1950s to the early 1970s, including the , , , and classes and the Type 12 President Class frigates built for the South African Navy in the 1960s. Operation Limbo was loaded and fired automatically with the crew under-cover and was stabilised in pitch and roll. The firing distance of the mortars was controlled by opening gas vents; rounds could be fired from . The weapon was linked to the sonar system of the ship, firing on command when the target was in range. The rounds were projected so t ...
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Boeing Harpoon
The Harpoon is an all-weather, over-the-horizon, anti-ship missile manufactured by McDonnell Douglas (now Boeing Defense, Space & Security). The AGM-84E Standoff Land Attack Missile (SLAM) and later AGM-84H/K SLAM-ER (Standoff Land Attack Missile – Expanded Response) are cruise missile variants. The regular Harpoon uses active radar homing and flies just above the water to evade defenses. The missile can be launched from: * Fixed-wing aircraft (the AGM-84, without the solid-fuel rocket booster) * Surface ships (the RGM-84, fitted with a solid-fuel rocket booster that detaches when expended, to allow the missile's main turbojet to maintain flight) * Submarines (the UGM-84, fitted with a solid-fuel rocket booster and encapsulated in a container to enable submerged launch through a torpedo tube); * Coastal defense batteries, from which it would be fired with a solid-fuel rocket booster. Development In 1965, the United States Navy began studies for a missile in the ra ...
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Anti-aircraft Warfare
Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It includes Surface-to-air missile, surface based, subsurface (Submarine#Armament, submarine launched), and air-based weapon systems, associated sensor systems, command and control arrangements, and passive measures (e.g. barrage balloons). It may be used to protect naval, ground, and air forces in any location. However, for most countries, the main effort has tended to be homeland defence. NATO refers to airborne air defence as counter-air and naval air defence as anti-aircraft warfare. Missile defense, Missile defence is an extension of air defence, as are initiatives to adapt air defence to the task of intercepting any projectile in flight. In some countries, such as Britain and Germany during the World War II, Second World War, the Soviet Union, and modern NATO a ...
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Radar
Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the objects and return to the receiver, giving information about the objects' locations and speeds. Radar was developed secretly for military use by several countries in the period before and during World War II. A key development was the cavity magnetron in the United Kingdom, which allowed the creation of relatively small systems with sub-meter resolution. Th ...
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