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Man Overboard Rescue Turn
A man overboard rescue turn (or person overboard) is a shiphandling manoeuvre usually implemented immediately upon learning of a person having gone overboad into the sea. To bring a vessel closer to the person's location, implementations of the principles described are: the Anderson turn (or single turn), the quick turn (also known as the Q-turn or the figure eight turn), the Williamson turn, and the Scharnow turn. The choice of manouevre is dependent on several factors, including: * Location of the casualty * Whether the casualty is seen going overboard immediately or if their missing is delayed * Whether the ship is using engines or using sails * The space available for the vessel to steer * The training of the crew involved. Ideally, in any man overboard scenario, the casualty should be approached with the vessel downwind of the persons position, with the vessel moving upwind. The man overboard rescue turn is often carried out as part of regular drills on Merchant ships as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Witherby Publishing Group
Witherby Publishing Group, formerly known as Witherby Seamanship, is a technical publisher of maritime, nautical and navigation training, reference and regulatory materials. The company is the resulting merger of Witherby Books and Seamanship International in January 2008. Beginning with its origins in 1740 it lays claim to being the oldest independent publisher in the English-speaking world. Witherbys are the official electronic distributors for the International Maritime Organization and publish guidance titles with numerous shipping bodies and maritime NGOs. These include the International Chamber of Shipping, the UK Chamber of Shipping, BIMCO, OCIMF, SIGTTO, North P&I, the UK P&I Club, the International Association of Classification Societies, the Merchant Navy Training Board and the Institute of Marine Engineering, Science and Technology (IMarEST). Witherbys are an official distributor of INTERTANKO publications. The company holds working groups, which include ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mainsail
A mainsail is a sail rigged on the main mast of a sailing vessel. * On a square rigged vessel, it is the lowest and largest sail on the main mast. * On a fore-and-aft rigged vessel, it is the sail rigged aft of the main mast. The sail's foot is normally attached to a boom. (In extremely heavy weather, the mainsail may be lowered, and a much smaller trysail hoisted in its place). Historical fore-and-aft rigs used a four-sided gaff rigged mainsail, sometimes setting a gaff topsail above it. Whereas once the mainsail was typically the largest sail, today the mainsail may be smaller than the jib or genoa; Prout catamarans typically have a mainmast stepped further aft than in a standard sloop, so that the mainsail is much smaller than the foresail. Bermuda rig The modern Bermuda rig uses a triangular mainsail aft of the mast, closely coordinated with a jib for sailing upwind. A large overlapping jib or genoa is often larger than the mainsail. In downwind conditions (with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teardrop Turn
A teardrop turn is a method of reversing the course of an aircraft or vessel so that it returns on its original path, travelling in the opposite direction, and passes through a specified point on the original path. Concept ;Aircraft: The teardrop turn has been described as a difficult maneuver which provides little margin for error, especially as an aviation procedure where a misjudgment can result in a stall and crash. The name comes from the overhead view of the track, which resembles an idealized teardrop. Teardrop turns are commonly used during air shows to make several passes over the runway, flying in opposite directions. Aircraft can use the teardrop turn to return to a fix while descending, a procedure called a teardrop penetration. Teardrop penetrations are typically performed under instrument flight rules. ;Watercraft: Ships and power boats generally use one of two types of teardrop turn to recover a man overboard: the Williamson turn or the Scharnow turn, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seamanship
Seamanship is the art, knowledge and competence of operating a ship, boat or other craft on water. The'' Oxford Dictionary'' states that seamanship is "The skill, techniques, or practice of handling a ship or boat at sea." It involves topics and development of specialised skills including: navigation and international maritime law and regulatory knowledge; weather, meteorology and forecasting; watchkeeping; ship-handling and small boat handling; operation of deck equipment, anchors and cables; ropework and line handling; communications; sailing; engines; execution of evolutions such as towing; cargo handling equipment, dangerous cargoes and cargo storage; dealing with emergencies; survival at sea and search and rescue; and fire fighting. The degree of knowledge needed within these areas is dependent upon the nature of the work and the type of vessel employed by a seafarer. History Ship knowledge, ship stability and cargo operations Seamanship on a commercial level inv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Submarine
A nuclear submarine is a submarine powered by a nuclear reactor, but not necessarily nuclear-armed. Nuclear submarines have considerable performance advantages over "conventional" (typically diesel-electric) submarines. Nuclear propulsion, being completely independent of air, frees the submarine from the need to surface frequently, as is necessary for conventional submarines. The large amount of power generated by a nuclear reactor allows nuclear submarines to operate at high speed for long periods, and the long interval between refuelings grants a range virtually unlimited, making the only limits on voyage times being imposed by such factors as the need to restock food or other consumables. The limited energy stored in electric batteries means that even the most advanced conventional submarine can only remain submerged for a few days at slow speed, and only a few hours at top speed, though recent advances in air-independent propulsion have somewhat ameliorated this disadv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russo-Japanese War
The Russo-Japanese War ( ja, 日露戦争, Nichiro sensō, Japanese-Russian War; russian: Ру́сско-япóнская войнá, Rússko-yapónskaya voyná) was fought between the Empire of Japan and the Russian Empire during 1904 and 1905 over rival imperial ambitions in Manchuria and the Korean Empire. The major theatres of military operations were located in Liaodong Peninsula and Mukden in Southern Manchuria, and the Yellow Sea and the Sea of Japan. Russia sought a warm-water port on the Pacific Ocean both for its navy and for maritime trade. Vladivostok remained ice-free and operational only during the summer; Port Arthur, a naval base in Liaodong Province leased to Russia by the Qing dynasty of China from 1897, was operational year round. Russia had pursued an expansionist policy east of the Urals, in Siberia and the Far East, since the reign of Ivan the Terrible in the 16th century. Since the end of the First Sino-Japanese War in 1895, Japan had feared Russia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John McPhee
John Angus McPhee (born March 8, 1931) is an American writer. He is considered one of the pioneers of creative nonfiction. He is a four-time finalist for the Pulitzer Prize in the category General Nonfiction, and he won that award on the fourth occasion in 1999 for '' Annals of the Former World'' (a collection of five books, including two of his previous Pulitzer finalists). In 2008, he received the George Polk Career Award for his "indelible mark on American journalism during his nearly half-century career". Since 1974, McPhee has been the Ferris Professor of Journalism at Princeton University. Background McPhee has lived in Princeton, New Jersey, for most of his life. He was born in Princeton, the son of the Princeton University athletic department's physician, Dr. Harry McPhee. He was educated at Princeton High School, then spent a postgraduate year at Deerfield Academy, before graduating from Princeton University in 1953 with a senior thesis titled "Skimmer Burns", and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Williamson Turn Imariners
Williamson may refer to: Places *Williamson, Arizona *Williamson, Georgia *Williamson, Illinois *Williamson, Iowa *Williamson, New York, a town in Wayne County, New York. * Williamson (CDP), New York, a hamlet and census-designated place in Wayne County, New York. *Williamson, West Virginia *Williamson County, Illinois *Williamson County, Tennessee *Williamson County, Texas People *Williamson (surname) Other uses *'' Williamson v. Lee Optical Co.'', a 1955 U.S. Supreme Court case *Williamson amplifier, a type of push-pull audio amplifier with low distortion first designed in 1947 *Williamson Road Junior Public School, an elementary school in Toronto, Ontario *Williamson ether synthesis, one of the most common methods for preparing ethers See also *Williams (other) *Williamston (other) *Williamstown (other) *Justice Williamson (other) Justice Williamson * John Isaac Williamson, associate justice of the Supreme Court of Missouri * Robert B. Will ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windward And Leeward
Windward () and leeward () are terms used to describe the direction of the wind. Windward is ''upwind'' from the point of reference, i.e. towards the direction from which the wind is coming; leeward is ''downwind'' from the point of reference, i.e. along the direction towards which the wind is going. The side of a ship that is towards the leeward is its "lee side". If the vessel is heeling under the pressure of crosswind, the lee side will be the "lower side". During the Age of Sail, the term ''weather'' was used as a synonym for ''windward'' in some contexts, as in the ''weather gage''. Because it captures rain, the windward side of a mountain tends to be wet compared to the leeward it blocks. Origin The term "lee" comes from the middle-low German word // meaning "where the sea is not exposed to the wind" or "mild". The terms Luv and Lee (engl. Windward and Leeward) have been in use since the 17th century. Usage Windward and leeward directions (and the points o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Man Overboard
"Man overboard!" is an exclamation given aboard a vessel to indicate that a member of the crew or a passenger has fallen off of the ship into the water and is in need of immediate rescue. Whoever sees the person's fall is to shout, "Man overboard!" and the call is then to be reported once by every crewman within earshot, even if they have not seen the victim fall, until everyone on deck has heard and given the same call. This ensures that all other crewmen have been alerted to the situation and notifies the officers of the need to act immediately to save the victim. Pointing continuously at the victim may aid the helmsman in approaching the victim. Causes A person may fall overboard for any number of reasons: they might have been struck by one of the ship's booms, they may have lost their footing on a slippery deck or while climbing the ship's ratlines, they may have deliberately jumped overboard in a suicide attempt, or any number of other reasons. Falling overboard is one of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
