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HTMS Sukhothai Subclass
HTMS ''Sukhothai'' (FS-442) ( th, เรือหลวงสุโขทัย, ) was a corvette of the operated by the Royal Thai Navy that was launched in 1986. On 18 December 2022 in the Gulf of Thailand, high winds and strong waves caused seawater to flow into the warship; this flooding caused the engines to fail, and the pumps also became unusable. ''Sukhothai'' continued to take on water until eventually sinking overnight. , the Royal Thai Navy had rescued 76 sailors and found 24 dead. An additional five sailors are presumed dead but their bodies were not found. Characteristics ''Sukhothai'' was a corvette. The intended role of the ''Ratanakosin''-class vessels was to provide surface-to-surface missile, surface-to-surface and surface-to-air missile, surface-to-air missile capability on a highly maneuverable platform. The ''Ratanakosin''-class corvettes, of which there were two, were long and wide, and had a displacement (ship), displacement of 960 tons at fu ...
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Sukhothai Kingdom
The Sukhothai Kingdom ( th, สุโขทัย, , IAST: , ) was a post-classical Thai kingdom ( mandala) in Mainland Southeast Asia surrounding the ancient capital city of Sukhothai in present-day north-central Thailand. The kingdom was founded by Si Inthrathit in 1238 and existed as an independent polity until 1438, when it fell under the influence of the neighboring Ayutthaya after the death of Borommapan (Maha Thammaracha IV). Sukhothai was originally a trade center in Lavo—itself under the suzerainty of the Khmer Empire—when Central Thai people led by Pho Khun Bang Klang Hao, a local leader, revolted and gained their independence. Bang Klang Hao took the regnal name of Si Inthrathit and became the first monarch of the Phra Ruang dynasty. The kingdom was centralized and expanded to its greatest extent during the reign of Ram Khamhaeng the Great (1279–1298), who some historians considered to have introduced Theravada Buddhism and the initial Thai script to ...
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Gulf Of Thailand
The Gulf of Thailand, also known as the Gulf of Siam, is a shallow inlet in the southwestern South China Sea, bounded between the southwestern shores of the Indochinese Peninsula and the northern half of the Malay Peninsula. It is around in length and up to in width, and has a surface area of . The gulf is surrounded on the north, west and southwest by the coastlines of Thailand (hence the name), on the northeast by Cambodia and the Mekong Delta region of Vietnam, and opens to the South China Sea in the southeast. Names The modern Thai name of the gulf is ''Ao Thai'' ( th, อ่าวไทย, , 'Thai Gulf') and "Gulf of Thailand" has been adopted as the official name of the body by the International Hydrographic Organization. Its name in Malay is he "Gulf of Siam", ''Teluk Siam'', and in km, ឈូងសមុទ្រសៀម'', Chhoung Samut Siem''. In Thai, the gulf is historically known as ''Ao Sayam'' ( th, อ่าวสยาม). In Vietnamese it is know ...
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Società Italiana Ernesto Breda
Società Italiana Ernesto Breda (), more usually referred to simply as Breda, was an Italian mechanical manufacturing company founded by Ernesto Breda in Milan in 1886. History The firm was founded by Ernesto Breda in Milan in 1886. It originally manufactured locomotives and other railway machinery, but later branched out into armaments and aircraft. Occasionally, not continuously, the company also built trolleybuses. In 1935, it acquired the railway division of Officine Ferroviarie Meridionali and, soon afterwards, the aircraft division of the same company. Breda-designed machine guns such as the Breda Model 30 and Breda Model 37 were standard issue weapons for the Royal Italian Army during the Second Italo-Abyssinian War, the Italian Invasion of Albania and World War 2. At the peak of its wartime production, the company had 26,000 employees. By 1954, its workforce had been reduced to around 8,000. In 1962, Breda was nationalised as part of EFIM, but was liquidated in ...
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OTO Melara 76 mm
The OTO Melara 76 mm gun, marketed as the OTO 76/62 Gun Mount, is a naval autocannon built and designed by the Italian defence company OTO Melara. It is based on the OTO Melara 76/62C and evolved toward 76/62 SR and 76/62 Strales. The system is compact enough to be installed on relatively small warships. Its high rate of fire and the availability of several types of ammunition make it capable of short-range anti-missile point defence, anti-aircraft, anti-surface, and ground support. Ammunition includes armour-piercing, incendiary, directed fragmentation effects, and a guided round marketed as capable of destroying maneuvering anti-ship missiles. It can be installed in a stealth cupola. The OTO Melara 76 mm has been widely exported, and is in use by sixty navies. It was favored over the French 100mm naval gun for the joint French/Italian project and FREMM frigate. On 27 September 2006 Iran announced it had started mass production of the Fajr-27, which is a rev ...
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Aspide
Aspide (the Italian name for the asp) is an Italian medium range air-to-air and surface-to-air missile produced by Selenia (then by Alenia Aeronautica, now a part of Leonardo S.p.A.). It is provided with semi-active radar homing seeker. It is very similar to the American AIM-7 Sparrow, using the same airframe, but uses an inverse monopulse seeker that is far more accurate and much less susceptible to ECM than the original conical scanning version. This resemblance, and that Selenia was provided with the technology know-how of the AIM-7 (around 1,000 of which it had produced under licence), has generally led non-Italian press to refer to the Aspide as a Sparrow variant. However, the Aspide had original electronics and warhead, and a new and more powerful engine. Closed-loop hydraulics were also substituted for Sparrow's open-loop type, which gave Aspide better downrange maneuverability. Even the control surfaces are different, replacing the original triangular wings, fixed in ...
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Alenia Aeronautica
Alenia Aeronautica was an Italian aerospace company. Its subsidiaries included Alenia Aermacchi and Alenia Aeronavali. Alenia Aeronautica was also the part-owner of ATR, a joint venture with European Aeronautic Defence and Space Company (EADS). During January 2012, the company was reorganized as Alenia Aermacchi. Three years later, it was fully merged into Finmeccanica, which has since reorganised itself as a more integrated business, adopting the Leonardo name for the group History Alenia Aeronautica was created during 1990 by merger of IRI's Aeritalia and Selenia subsidiaries. The new company was associated with several ongoing aircraft programmes and partnerships, including the multinational Eurofighter Typhoon fighter programme, the Panavia Tornado fighter-bomber. As a partner in Panavia Aircraft GmbH, Aeritalia manufactured the Tornado's wings while the other partners ( British Aerospace and MBB/DASA) manufactured the rest of the airframe.Segell 1997, p. 125. It ...
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Harpoon (missile)
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 ...
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Flag Officer
A flag officer is a commissioned officer in a nation's armed forces senior enough to be entitled to fly a flag to mark the position from which the officer exercises command. The term is used differently in different countries: *In many countries, a flag officer is a senior officer of the navy, specifically those who hold any of the admiral ranks; the term may or may not include the rank of commodore. *In some countries, such as the United States, India, and Bangladesh it may apply to all armed forces, not just the navy. This means generals can also be considered flag officers. *In most Arab armies, ''liwa'' (Arabic: لواء), which can be translated as flag officer, is a specific rank, equivalent to a major general. However, " ensign" is debatably a more exact translation of the word. In principle, a flag officer commands several units called "flags" (or "ensigns") (i.e. brigades). General usage The generic title of flag officer is used in many modern navies and coast gu ...
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Propeller Shaft
A drive shaft, driveshaft, driving shaft, tailshaft (Australian English), propeller shaft (prop shaft), or Cardan shaft (after Girolamo Cardano) is a component for transmitting mechanical power and torque and rotation, usually used to connect other components of a drivetrain that cannot be connected directly because of distance or the need to allow for relative movement between them. As torque carriers, drive shafts are subject to torsion and shear stress, equivalent to the difference between the input torque and the load. They must therefore be strong enough to bear the stress, while avoiding too much additional weight as that would in turn increase their inertia. To allow for variations in the alignment and distance between the driving and driven components, drive shafts frequently incorporate one or more universal joints, jaw couplings, or rag joints, and sometimes a splined joint or prismatic joint. History The term ''driveshaft'' first appeared during the mid-19th centu ...
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Diesel Engine
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-called compression-ignition engine (CI engine). This contrasts with engines using spark plug-ignition of the air-fuel mixture, such as a petrol engine ( gasoline engine) or a gas engine (using a gaseous fuel like natural gas or liquefied petroleum gas). Diesel engines work by compressing only air, or air plus residual combustion gases from the exhaust (known as exhaust gas recirculation (EGR)). Air is inducted into the chamber during the intake stroke, and compressed during the compression stroke. This increases the air temperature inside the cylinder to such a high degree that atomised diesel fuel injected into the combustion chamber ignites. With the fuel being injected into the air just before combustion, the dispersion of the fuel is ...
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Royal Saudi Navy
The Royal Saudi Navy ( ar, البَحْريَّة الْمَلكيَّة السُّعُودِيَّة, Al-Quwwat al-Bahriyah al-Arabiyah as-Su'udiyah) or Royal Saudi Naval Forces ( ar, القُوَّات البَحْريَّة الْمَلكيَّة السُّعُودِيَّة, Al-Quwwat al-Bahriyah al-Malakiyah as-Su'udiyah), is the maritime arm of the Saudi Arabian Armed Forces and one of the five service branches of the Ministry of Defense of Saudi Arabia. Its primary role is monitoring and defending the Saudi territorial waters against military or economic intrusion, and participating in international naval alliances. The Navy operates from multiple bases along the Saudi coastline, with two fleets. * The Eastern Fleet operates in the Persian Gulf from the King Abdulaziz Naval Base at Jubail. * The Western Fleet operates in the Red Sea from the King Faisal Naval Base at Jeddah. Each fleet has a full military capability including warships, support ships, administrative ...
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Full Load
The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weight. Traditionally, various measurement rules have been in use, giving various measures in long tons. Today, tonnes are more commonly used. Ship displacement varies by a vessel's degree of load, from its empty weight as designed (known as "lightweight tonnage") to its maximum load. Numerous specific terms are used to describe varying levels of load and trim, detailed below. Ship displacement should not be confused with measurements of volume or capacity typically used for commercial vessels and measured by tonnage: net tonnage and gross tonnage. Calculation The process of determining a vessel's displacement begins with measuring its draft.George, 2005. p.5. This is accomplished by means of its "draft marks" (or "load lines"). A mer ...
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