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Ship Floodability
Floodability is the susceptibility of a ship's construction to flooding. It also refers to the ability to intentionally flood certain areas of the hull for damage control purposes, or to increase stability, which is particularly important in combat vessels, which often face the possibility of serious hull breach due to enemy action, and which rely on well-trained damage controlmen to equalize and then stop flooding of the hull. Floodability is reduced by dividing the volume of the hull into watertight compartments with decks and bulkheads (which also increase the strength of ships), use of double bottom (or double hull), and by other means. If a ship's hull is divided into watertight compartments, any flooding resulting from a breach of the hull can be contained in the compartments where the flooding occurs. In most cases, the watertight compartments are fitted with a system of automatic doors, which can be triggered either remotely or locally as soon as flooding is detec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compartments And Watertight Subdivision Of A Ship's Hull (Seaman's Pocket-Book, 1943)
Compartment may refer to: Biology * Compartment (anatomy), a space of connective tissue between muscles * Compartment (chemistry), in which different parts of the same protein molecule serve different functions * Compartment (development), fields of cells of distinct cell lineage, cell affinity, and genetic identity * Compartment (pharmacokinetics), a defined and distinct volume of body fluids * Cellular compartment, a closed part within a cell, surrounded by a membrane Other uses * Compartment coach, a railway car divided into separate areas or compartments, with no means of moving between them * Compartment (ship), subdivision of the space within a ship * Compartment (heraldry), the part of a coat of arms design which appears immediately below the shield * Multi-compartment model, a type of mathematical model * "Compartments", a song and album by José Feliciano * Hidden compartment See also * * * Compartmentalization (other) * Apartment * Division (other) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller
A propeller (often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon a working fluid such as water or air. Propellers are used to pump fluid through a pipe or duct, or to create thrust to propel a boat through water or an aircraft through air. The blades are shaped so that their rotational motion through the fluid causes a pressure difference between the two surfaces of the blade by Bernoulli's principle which exerts force on the fluid. Most marine propellers are screw propellers with helical blades rotating on a propeller shaft (ship), propeller shaft with an approximately horizontal axis. History Early developments The principle employed in using a screw propeller is derived from stern sculling. In sculling, a single blade is moved through an arc, from side to side taking care to keep presenting the blade to the wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shipbuilding
Shipbuilding is the construction of ships and other Watercraft, floating vessels. In modern times, it normally takes place in a specialized facility known as a shipyard. Shipbuilders, also called shipwrights, follow a specialized occupation that traces its roots to before recorded history. Until recently, with the development of complex non-maritime technologies, a ship has often represented the most advanced structure that the society building it could produce. Some key industrial advances were developed to support shipbuilding, for instance the sawing of timbers by Saw#Mechanically powered saws, mechanical saws propelled by windmills in Dutch shipyards during the first half of the 17th century. The design process saw the early adoption of the logarithm (invented in 1615) to generate the curves used to produce the shape of a hull (watercraft), hull, especially when scaling up these curves accurately in the mould Lofting, loft. Shipbuilding and ship repairs, both commercial an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stepan Makarov
Stepan Osipovich Makarov (, ; – ) was a Russian vice-admiral, commander in the Imperial Russian Navy, oceanographer, member of the Russian Academy of Sciences, and author of several books. He was a pioneer of insubmersibility theory (the concept of counter-flooding to stabilise a damaged ship), and developer of a Cyrillic-based semaphore alphabet. A proponent of icebreaker use, he supervised the first polar icebreaker construction. Makarov also designed several ships. Makarov saw service in the Russo-Turkish War (1877–1878) as a captain, and ordered the first successful attack with a self propelled torpedo. He served again in the Russo-Japanese War as vice-admiral and was assigned to the defense of Port Arthur, where he was hailed as a competent and aggressive commander. On 13 April 1904 Makarov led his flotilla to the aid of a destroyer that had been ambushed by the Japanese. Makarov was killed in the subsequent battle when his flagship ''Petropavlovsk'' struck a n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexei Krylov
Aleksey Nikolaevich Krylov (; – October 26, 1945) was a Russian naval engineer, applied mathematician and memoirist. Biography Aleksey Nikolayevich Krylov was born on August 3 O.S., 1863 in Visyaga village near the town of Alatyr, Simbirsk Governorate, Russian Empire (today Krylovo, Chuvashia) to the family of a retired artillery officer. His father, Nikolay Aleksandrovich Krylov (1830-1911), was the local landlord and vice-Marshal of Nobility, but had relatively liberal views and later led the ''zemskaya uprava'' (the Executive Board of the Zemstvo self-government system) in Alatyr. His mother, née Sofya Viktorovna Lyapunova, was a member of the distinguished Lyapunov family (the mathematician Aleksandr Mikhailovich Lyapunov and musician Sergei Mikhailovich Lyapunov were his second cousins). In 1878 Krylov entered the Naval College (rus. Морское училище) and graduated with distinction in 1884. There he did his first scientific work with Ivan de Collong o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junk (ship)
A junk () is a type of China, Chinese sailing ship characterized by a central rudder, an overhanging flat Transom (nautical), transom, watertight Bulkhead (partition), bulkheads, and a flat-bottomed design. They are also characteristically built using iron nails and clamps. The term applies to many types of small coastal or river ships, usually serving as cargo ships, pleasure boats, or houseboats, but also going up in size up to large ocean-going vessels. There can be significant regional variations in the type of rig and the layout of the vessel. Chinese junks were originally only fluvial and had square sails, but by the Song dynasty (), they adopted ocean-going technologies acquired from Southeast Asian ''k'un-lun po'' trade ships. Tanja sails and fully-battened junk rigs were introduced to Chinese junks by the 12th century CE. Similar designs to the Chinese junk were also adopted by other East Asian countries, most notably Japan, where junks were used as merchant ships to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kublai Khan
Kublai Khan (23 September 1215 – 18 February 1294), also known by his temple name as the Emperor Shizu of Yuan and his regnal name Setsen Khan, was the founder and first emperor of the Mongol-led Yuan dynasty of China. He proclaimed the dynastic name "Great Yuan" in 1271, and ruled Yuan China until his death in 1294. Kublai was the second son of Tolui by his chief wife Sorghaghtani Beki, and a grandson of Genghis Khan. He was almost 12 when Genghis Khan died in 1227. He had succeeded his older brother Möngke as Khagan in 1260, but had to defeat his younger brother Ariq Böke in the Toluid Civil War lasting until 1264. This episode marked the beginning of the division of the Mongol Empire. Kublai's real power was limited to the Yuan Empire, even though as Khagan he still influenced the Ilkhanate and, to a significantly lesser degree, the Golden Horde. In 1271, Kublai established the Yuan dynasty and formally claimed orthodox succession from prior Chinese dynasties. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science And Technology Of The Song Dynasty
The Song dynasty (; 960–1279 CE) witnessed many substantial History of science and technology in China, scientific and technological advances in History of China, Chinese history. Some of these advances and innovations were the products of talented statesmen and scholar-officials drafted by the government through imperial examinations. Shen Kuo (1031–1095), author of the ''Dream Pool Essays'', is a prime example, an List of Chinese inventions, inventor and pioneering figure who introduced many new advances in Chinese astronomy and Chinese mathematics, mathematics, establishing the concept of true north in the first known experiments with the magnetic compass. However, commoner craftsmen such as Bi Sheng (972–1051), the inventor of History of printing in East Asia, movable type printing (in a form predating the printing press of Johannes Gutenberg), were also heavily involved in technical innovations. The ingenuity of advanced mechanical engineering had a long tradition in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zhu Yu (author)
Zhu Yu () was a Chinese maritime historian during the Song dynasty (960–1279 AD). He retired in Huang Gang (黄岗) of the Hubei province, bought a country house and named it "Pingzhou". He called himself "Expert Vegetable Grower of Pingzhou (萍洲老圃)". Between 1111 and 1117 AD, Zhu Yu wrote the book ''Pingzhou Ketan'' (萍洲可談; Pingzhou Table Talks), published in 1119 AD.Needham, Volume 4, Part 3, 381. It covered a wide variety of maritime subjects and issues in China at the time. His extensive knowledge of maritime engagements, technologies, and practices were because his father, Zhu Fu, was the Port Superintendent of Merchant Shipping for Guangzhou from 1094 until 1099 AD, whereupon he was elevated to the status of governor there and served in that office until 1102 AD.Needham, Volume 4, Part 1, 279. ''Pingzhou Table Talks'' In terms of global significance, Zhu Yu's book was the first book in history to mention the use of the mariner's magnetic-needle compass for nav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Song Dynasty
The Song dynasty ( ) was an Dynasties of China, imperial dynasty of China that ruled from 960 to 1279. The dynasty was founded by Emperor Taizu of Song, who usurped the throne of the Later Zhou dynasty and went on to conquer the rest of the Five Dynasties and Ten Kingdoms period#Ten Kingdoms, Ten Kingdoms, ending the Five Dynasties and Ten Kingdoms period. The Song frequently came into conflict with the contemporaneous Liao dynasty, Liao, Western Xia and Jin dynasty (1115–1234), Jin dynasties in northern China. After retreating to southern China following attacks by the Jin dynasty, the Song was eventually conquered by the Mongol-led Yuan dynasty. The History of the Song dynasty, dynasty's history is divided into two periods: during the Northern Song (; 960–1127), the capital was in the northern city of Bianjing (now Kaifeng) and the dynasty controlled most of what is now East China. The #Southern Song, 1127–1279, Southern Song (; 1127–1279) comprise the period following ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballast Tank
A ballast tank is a Compartment (ship), compartment within a boat, ship or other floating structure that holds water, which is used as ballast to provide hydrostatic stability for a vessel, to reduce or control buoyancy, as in a submarine, to correct Trim (vessel), trim or Angle of list, list, to provide a more even load distribution along the hull to reduce structural Hogging and sagging, hogging or sagging stresses, or to increase Draft (hull), draft, as in a semi-submersible vessel or platform, or a SWATH, to improve seakeeping. Using water in a tank provides easier weight adjustment than the stone or iron ballast used in older vessels, and makes it easy for the crew to reduce a vessel's Draft (hull), draft when it enters shallower water, by temporarily pumping out ballast. Airships use ballast tanks mainly to control buoyancy and correct trim. History The concept of ballast tanks, inspired by nature, can be seen in aquatic life forms like blowfish and the argonaut octopus, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine
A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or informally to refer to remotely operated vehicles and Autonomous underwater vehicle, robots, or to medium-sized or smaller vessels (such as the midget submarine and the wet sub). Submarines are referred to as ''boats'' rather than ''ships'' regardless of their size. Although experimental submarines had been built earlier, submarine design took off during the 19th century, and submarines were adopted by several navies. They were first used widely during World War I (1914–1918), and are now used in many navy, navies, large and small. Their military uses include: attacking enemy surface ships (merchant and military) or other submarines; aircraft carrier protection; Blockade runner, blockade running; Ballistic missile submarine, nuclear deterrenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
