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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 detected ( ... [...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 serves 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) * S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller
A propeller (colloquially 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 specially 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 sculling. In sculling, a single blade is moved through an arc, from side to side taking care to keep presenting the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shipbuilding
Shipbuilding is the construction of ships and other floating vessels. 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. Shipbuilding and ship repairs, both commercial and military, are referred to as " naval engineering". The construction of boats is a similar activity called boat building. The dismantling of ships is called ship breaking. History Pre-history The earliest known depictions (including paintings and models) of shallow-water sailing boats is from the 6th to 5th millennium BC of the Ubaid period of Mesopotamia. They were made from bundled reeds coated in bitumen and had bipod masts. They sailed in shallow coastal waters of the Persian Gulf. 4th millennium BC Ancient Egypt Evidence from Ancient Egypt shows that the early Egyptians knew how to assemble planks of wood into a ship hull as early as 3100 BC. Egyptia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stepan Makarov
Stepan Osipovich Makarov (russian: Степа́н О́сипович Мака́ров, uk, Макаров Степан Осипович; – ) 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 ever 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 ever 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 b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexei Krylov
, birth_date = O.S. (August 15, 1863 N.S.) , death_date = , image = Alexey Krylov 1910s.JPG , image_size = 200px , caption = Official portrait (1910) , birth_place = Alatyrsky uezd of Simbirsk Gubernia, Russian Empire , death_place = Leningrad, USSR , placeofburial = Leningrad, USSR , placeofburial_label = , allegiance = Russian Empire , branch = Imperial Russian Navy , serviceyears = 1878–1917 , rank = General of the fleet , unit = , commands = , battles = , awards = , relations = , laterwork = , signature = Signature of Aleksey Krylov.png , signature_size = 150px , signature_alt = Aleksey Nikolaevich Krylov (russian: Алексе́й Никола́евич Крыло́в; – 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 vil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junk (ship)
A junk (Chinese: 船, ''chuán'') is a type of China, Chinese sailing ship with junk rig, fully battened sails. There are two types of junk in China: northern junk, which developed from Chinese river boats, and southern junk, which developed from Austronesian peoples, Austronesian ships visiting southern Chinese coasts since the 3rd century CE. They continued to evolve in later dynasties and were predominantly used by Chinese traders throughout Southeast Asia. Similar junk sails were also adopted by other East Asian countries, most notably Japan where junks were used as merchant ships to trade goods with China and Red seal ships, Southeast Asia. They were found, and in lesser numbers are still found, throughout Southeast Asia and India, but primarily in China. Historically, a Chinese junk could be one of many types of small coastal or river ships, usually serving as a cargo ship, pleasure boat, or houseboat, but also ranging in size up to large ocean-going vessel. Found more broad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kublai Khan
Kublai ; Mongolian script: ; (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 of the Yuan dynasty of China and the fifth khagan-emperor of the Mongol Empire from 1260 to 1294, although after the division of the empire this was a nominal position. He proclaimed the empire's 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 fragmentation of the empire. Kublai's real power was limited to the Yuan Empire, even though as Khagan he still had influence in the Ilkhanate and, to a significantly lesser deg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science And Technology Of The Song Dynasty
The Song dynasty (; 960–1279 CE) invented some technological advances in Chinese history, many of which came from talented statesmen drafted by the government through imperial examinations. The ingenuity of advanced mechanical engineering had a long tradition in China. The Song engineer Su Song admitted that he and his contemporaries were building upon the achievements of the ancients such as Zhang Heng (78–139), an astronomer, inventor, and early master of mechanical gears.Needham, Volume 4, Part 2, 466. The application of movable type printing advanced the already widespread use of woodblock printing to educate and amuse Confucian students and the masses. The application of new weapons employing the use of gunpowder enabled the Song to ward off its militant enemies—the Liao, Western Xia, and Jin with weapons such as cannons—until its collapse to the Mongol forces of Kublai Khan in the late 13th century. Notable advances in civil engineering, nautics, and metallu ... [...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 navi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Song Dynasty
The Song dynasty (; ; 960–1279) was an imperial dynasty of China that began in 960 and lasted until 1279. The dynasty was founded by Emperor Taizu of Song following his usurpation of the throne of the Later Zhou. The Song conquered the rest of the Ten Kingdoms, ending the Five Dynasties and Ten Kingdoms period. The Song often came into conflict with the contemporaneous Liao, Western Xia and Jin dynasties in northern China. After retreating to southern China, the Song was eventually conquered by the Mongol-led Yuan dynasty. The dynasty is divided into two periods: Northern Song and Southern Song. 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 Eastern China. The Southern Song (; 1127–1279) refers to the period after the Song lost control of its northern half to the Jurchen-led Jin dynasty in the Jin–Song Wars. At that time, the Song court retreated south of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballast Tank
A ballast tank is a 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 or list, to provide a more even load distribution along the hull to reduce structural hogging or sagging stresses, or to increase 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 when it enters shallower water, by temporarily pumping out ballast. Airships use ballast tanks mainly to control buoyancy and correct trim. History The basic concept behind the ballast tank can be seen in many forms of aquatic life, such as the blowfish or argonaut octopus. The concept has been invented and reinvented many times by humans to serve a variety of pur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine
A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub. Submarines are referred to as ''boats'' rather than ''ships'' irrespective of their size. Although experimental submarines had been built earlier, submarine design took off during the 19th century, and they were adopted by several navies. They were first widely used during World War I (1914–1918), and are now used in many navies, large and small. Military uses include attacking enemy surface ships (merchant and military) or other submarines, and for aircraft carrier protection, blockade running, nuclear deterrence, reconnaissance, conventional land attack (for example, using a cruise missile), and covert insertion o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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