1.
Spinnaker
–
A spinnaker is a sail designed specifically for sailing off the wind from a reaching course to a downwind, i. e. with the wind 90°–180° off bow. The spinnaker fills with wind and balloons out in front of the boat when it is deployed, called flying and it is constructed of lightweight fabric, usually nylon, and is often brightly coloured. It may be optimised for a range of wind angles, as either a reaching or a running spinnaker, by the shaping of the panels. Some types of spinnaker can be carried by the side of the boat and this is called flying a shy spinnaker, and is used for reaching. The spinnaker is often called a kite, or a chute because it resembles a parachute in both construction and appearance. This should not be confused with the spinnaker chute which is a hull fitting sometimes used for launching and recovering the spinnaker, a purported etymology has the first boat to carry this sail being a Cowes yacht named Sphinx, from which Sphinxs Acre and eventually Spinnaker. A spinnaker is used for sailing with the direction of the wind, symmetrical spinnakers have large amounts of camber, making them nearly hemispherical. Both lift and drag propel the boat forward when moving with the wind, reaching spinnakers have less camber as they operate within an airflow that generates lift. A well designed spinnaker will have leading edges when filled. A well designed spinnaker will also have a curve when filled. Any deviations from a curve will cause the airflow over the leeward side of the sail to separate causing a reduction in lift. When running downwind in heavy weather or when hit by a gust, with or without a spinnaker, there may be a tendency for a roll of increasing amplitude to build up, known as the death roll. Excessive heel leads to loss of rudder effectiveness resulting in the boat slewing round uncontrollably in the direction opposite to the direction of heel, luffing carefully onto a broad reach may help to retain control, as can moving everyones weight as far aft as possible. There are two categories of spinnakers, symmetric and asymmetric depending on whether a plane of symmetry exists for that particular sail. Asymmetric spinnakers operate more like a jib, generating lift from the side and this makes asymmetrics a better choice on reaching courses than symmetric spinnakers, which excel when running. The symmetric one is the most classic type, running alongside the boat controlled by lines known as a sheet. The windward line, or guy, is attached to the called the tack of the sail. The leeward line is called the sheet and it attaches to the clew of the spinnaker and is used to control the shape of the sail
2.
Rudder
–
A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, aircraft, or other conveyance that moves through a fluid medium. On an aircraft the rudder is used primarily to counter adverse yaw, a rudder operates by redirecting the fluid past the hull or fuselage, thus imparting a turning or yawing motion to the craft. In basic form, a rudder is a plane or sheet of material attached with hinges to the crafts stern, tail. Often rudders are shaped so as to minimize hydrodynamic or aerodynamic drag, on simple watercraft, a tiller—essentially, a stick or pole acting as a lever arm—may be attached to the top of the rudder to allow it to be turned by a helmsman. In larger vessels, cables, pushrods, or hydraulics may be used to link rudders to steering wheels, in typical aircraft, the rudder is operated by pedals via mechanical linkages or hydraulics. Generally, a rudder is part of the apparatus of a boat or ship that is fastened outside the hull, that is denoting all different types of oars, paddles. More specifically, the gear of ancient vessels can be classified into side-rudders and stern-mounted rudders. A third term, steering oar, can denote both types, in a Mediterranean context, side-rudders are more specifically called quarter-rudders as the later term designates more exactly the place where the rudder was mounted. Stern-mounted rudders are uniformly suspended at the back of the ship in a central position. S, a steering oar was used at this time because the rudder had not yet been invented. With a single sail, a frequent movement of the oar was required to steer a straight course. The steering oar or steering board is an oar or board to control the direction of a ship or other watercraft prior to the invention of the rudder. It is normally attached to the side in larger vessels, though in smaller ones it is rarely, if ever. Rowing oars set aside for steering appeared on large Egyptian vessels long before the time of Menes, in the Old Kingdom as much as five steering oars are found on each side of passenger boats. The tiller, at first a small pin run through the stock of the steering oar, both the tiller and the introduction of an upright steering post abaft reduced the usual number of necessary steering oars to one each side. In Iran, oars mounted on the side of ships for steering are documented from the 3rd millennium BCE in artwork, wooden models, the strength of the steering oar lay in its combination of effectiveness, adaptability and simpleness. Roman quarter steering oar mounting systems survived mostly intact through the medieval period, by the first half of the 1st century AD, steering gear mounted on the stern were also quite common in Roman river and harbour craft as proved from reliefs and archaeological finds. A tomb plaque of Hadrianic age shows a harbour tug boat in Ostia with a long stern-mounted oar for better leverage, interestingly, the boat already featured a spritsail, adding to the mobility of the harbour vessel. Further attested Roman uses of stern-mounted steering oars includes barges under tow, transport ships for wine casks, also, the well-known Zwammerdam find, a large river barge at the mouth of the Rhine, featured a large steering gear mounted on the stern
3.
Mast (sailing)
–
The mast of a sailing vessel is a tall spar, or arrangement of spars, erected more or less vertically on the centre-line of a ship or boat. Its purposes include carrying sail, spars, and derricks, and giving necessary height to a light, look-out position, signal yard, control position. Large ships have several masts, with the size and configuration depending on the style of ship, nearly all sailing masts are guyed. Until the mid-19th century all vessels masts were made of wood formed from a single or several pieces of timber which typically consisted of the trunk of a conifer tree. From the 16th century, vessels were built of a size requiring masts taller and thicker than could be made from single tree trunks. On these larger vessels, to achieve the height, the masts were built from up to four sections, known in order of rising height above the decks as the lower, top, topgallant. Giving the lower sections sufficient thickness necessitated building them up separate pieces of wood. Such a section was known as a made mast, as opposed to sections formed from pieces of timber. Jigger-mast, typically, where it is the shortest, the aftmost mast on vessels with more than three masts. On a two-masted vessel with the main-mast forward and a smaller second mast, such as a ketch, or particularly a yawl. Although two-masted schooners may be provided with masts of identical size, the aftmost is still referred to as the main-mast, schooners have been built with up to seven masts in all, with several six-masted examples. On square-rigged vessels, each mast carries several horizontal yards from which the sails are rigged. A two-masted merchant vessel with a sizable foresail rigged on a slightly inclined foremast is depicted in an Etruscan tomb painting from 475–450 BC. While most of the ancient evidence is iconographic, the existence of foremasts can also be deduced archaeologically from slots in foremast-feets located too close to the prow for a mainsail. Artemon, along with mainsail and topsail, developed into the rig of seagoing vessels in imperial times. The imperial grain freighters travelling the routes between Alexandria and Rome also included three-masted vessels, a mosaic in Ostia depicts a freighter with a three-masted rig entering Romes harbour. Special craft could carry many more masts, Theophrastus records how the Romans imported Corsican timber by way of a raft propelled by as many as fifty masts. Throughout antiquity, both foresail and mizzen remained secondary in terms of size, although large enough to require full running rigging
4.
Yacht
–
A yacht /ˈjɒt/ is a recreational boat or ship. In modern use of the term, yachts differ from working ships mainly by their leisure purpose, there are two different classes of yachts, sailing and power boats. With the rise of the steamboat and other types of powerboat, sailing vessels in general came to be perceived as luxury, later the term came to encompass large motor boats for primarily private pleasure purposes as well. Yacht lengths normally range from 10 metres up to dozens of meters, a luxury craft smaller than 12 metres is more commonly called a cabin cruiser or simply a cruiser. A superyacht generally refers to any yacht above 24 m and a megayacht generally refers to any yacht over 50 metres and this size is small in relation to typical cruise liners and oil tankers. A few countries have a special flag worn by recreational boats or ships, although inspired by the national flag, the yacht ensign does not always correspond with the civil or merchant ensign of the state in question. Yacht ensigns differ from merchant ensigns in order to signal that the yacht is not carrying cargo that requires a customs declaration, carrying commercial cargo on a boat with a yacht ensign is deemed to be smuggling in many jurisdictions. Until the 1950s, almost all yachts were made of wood or steel, although wood hulls are still in production, the most common construction material is fibreglass, followed by aluminium, steel, carbon fibre, and ferrocement. The use of wood has changed and is no longer limited to traditional board-based methods, wood is mostly used by hobbyists or wooden boat purists when building an individual boat. Apart from materials like carbon fibre and aramid fibre, spruce veneers laminated with epoxy resins have the best weight-to-strength ratios of all boatbuilding materials. Sailing yachts can range in length from about 6 metres to well over 30 metres. Most privately owned yachts fall in the range of about 7 metres -14 metres, in the United States, sailors tend to refer to smaller yachts as sailboats, while referring to the general sport of sailing as yachting. Within the limited context of racing, a yacht is any sailing vessel taking part in a race. Many modern racing yachts have efficient sail-plans, most notably the Bermuda rig. This capability is the result of a sail-plan and hull design oriented towards this capability, day sailing yachts are usually small, at under 6 metres in length. Sometimes called sailing dinghies, they often have a keel, centreboard. Most day sailing yachts do not have a cabin, as they are designed for hourly or daily use and not for overnight journeys. They may have a cabin, where the front part of the hull has a raised solid roof to provide a place to store equipment or to offer shelter from wind or spray
5.
USS Gerald R. Ford
–
Gerald R. Ford is the lead ship of her class of United States Navy supercarriers. It is currently a pre-commissioning unit expected to be commissioned into the Navy in 2017. The ship is named after the 38th President of the United States Gerald R. Ford, the keel of Gerald R. Ford was laid down on 13 November 2009. Construction began on 11 August 2005, when Northrop Grumman held a ceremonial steel cut for a 15-ton plate that forms part of a side shell unit of the carrier and she was christened on 9 November 2013. The schedule called for the ship to join the U. S. Navys fleet in March 2016 with the first deployment in 2019, Gerald R. Ford will enter the fleet replacing the inactive USS Enterprise, which ended her 51 years of active service in December 2012. In 2006, while Gerald Ford was still alive, Senator John Warner of Virginia proposed to amend a 2007 defense-spending bill to declare that CVN-78 shall be named the USS Gerald Ford. The final version signed by President George W. Bush on 17 October 2006 declared only that it is the sense of Congress that, CVN-78 should be named the U. S. S. Since such sense of language is typically non-binding and does not carry the force of law, rumsfeld indicated that he had personally told Ford of the honor during a visit to his home in Rancho Mirage a few weeks before Fords death. This makes the aircraft one of the few U. S. ships named after a living person. Later in the day, the Navy confirmed that the carrier would indeed be named after the former President. On 16 January 2007, Navy Secretary Donald Winter officially named CVN-78 USS Gerald R. Ford, Fords daughter Susan Ford Bales was named the ships sponsor. The announcements were made at a Pentagon ceremony attended by Vice President Dick Cheney, Senators Warner and Levin, swan III, Bales, Fords other three children, and others. The USS America Carrier Veterans Association had pushed to name the ship USS America, the CVA is an association of sailors who served aboard USS America. The carrier was decommissioned in 1996 and scuttled in the Atlantic, as part of a damage test of large aircraft carriers in 2005. On 10 September 2008, the U. S. Navy signed a $5.1 billion contract with Northrop Grumman Shipbuilding in Newport News, Virginia, to design, Northrop had begun advance construction of the carrier under a $2. 7 billion contract in 2005. The carrier is being constructed at the Huntington Ingalls Newport News Shipbuilding facilities in Newport News, Virginia, the keel of the new warship was ceremonially laid on 14 November 2009 in Dry Dock 12 by Fords daughter, Susan Ford Bales. And that is the legacy we remember this morning, as of August 2011, the carrier was reported to be structurally halfway complete. In April 2012, it was said to be 75 percent complete, on 24 May 2012, the important milestone of completing the vessel up to the waterline was reached when the critical lower bow was lifted into place
6.
Keel laying
–
Laying the keel or laying down is the formal recognition of the start of a ships construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company, keel laying is one of the four specially-celebrated events in the life of a ship, the others are launching, commissioning, and decommissioning. In earlier times, the event recognized as the keel laying was the placement of the central timber making up the backbone of a vessel. As steel ships replaced wooden ones, the central timber gave way to a steel beam. Modern ships are now built in a series of pre-fabricated. The event recognized as the keel laying is the first joining of modular components and it is now often called keel authentication, and is the ceremonial beginning of the ships life, although modules may have been started months before that stage of construction. Keel-related traditions from the times of wooden ships are said to bring luck to the ship during construction and to the captain, the first milestone in the history of a ship is the generally simple ceremony that marks the laying of the keel. Invitations to the ceremony are issued by officials, and the ceremony is conducted by them. The builder may be the commander of a shipyard or the president of a private company. The ships prospective name, without the USS, is mentioned in the invitation, if known, otherwise her type and number are given, e. g. DD2217
7.
Newport News Shipbuilding
–
Founded as the Chesapeake Dry Dock and Construction Co. in 1886, Newport News Shipbuilding has built more than 800 ships, including both naval and commercial ships. Located in the city of Newport News, their facilities more than 550 acres. The shipyard is building the aircraft carriers USS Gerald R. Ford, also under construction are the Virginia-class submarines USS Indiana and USS Washington. In 2013, Newport News Shipbuilding began the deactivation of the first nuclear-powered aircraft carrier, USS Enterprise, Newport News Shipbuilding also performs refueling and complex overhaul work on Nimitz-class aircraft carriers. This is a four-year vessel renewal program that not only involves refueling of the nuclear reactors. The yard has completed RCOH for four Nimitz-class carriers, as of May 2016 this work was underway for the fifth Nimitz-class vessel, USS Abraham Lincoln. Industrialist Collis P. Huntington provided crucial funding to complete the Chesapeake and Ohio Railroad from Richmond, however, building the railroad and coal pier was only the first part of Huntingtons dreams for Newport News. In 1886 he built a shipyard to repair ships servicing this transportation hub, in 1891 Newport News Shipbuilding and Drydock Company delivered its first ship, the tugboat Dorothy. By 1897 NNS had built three warships for the US Navy, USS Nashville, Wilmington and Helena, when Collis died in 1900, his nephew Henry E. Huntington inherited much of his uncles fortune. He also married Collis widow Arabella Huntington, and assumed Colliss leadership role with Newport News Shipbuilding, under Henry Huntingtons leadership, growth continued. In 1906 the revolutionary HMS Dreadnought launched a naval race worldwide. Between 1907 and 1923, Newport News built six of the US Navys total of 22 dreadnoughts – USS Delaware, Texas, Pennsylvania, Mississippi, Maryland, all but the first were in active service in World War II. In 1907 President Theodore Roosevelt sent the Great White Fleet on its round-the-world voyage, NNS had built seven of its 16 battleships. In 1914 NNS built SS Medina for the Mallory Steamship Company, in the early years, leaders of the Newport News community and those of the shipyard were virtually interchangeable. Post served from March 9,1911 to Feb.12,1912, earlier, he had come to the area as one of the builders of the C&O Railways terminals, and had served as the first mayor of Newport News after it became an independent city in 1896. It was on March 14,1914 that Albert Lloyd Hopkins and his assistant, Frederic Gauntlett, was also on board, but was able to swim to safety. Homer Lenoir Ferguson was company vice president when Hopkins died, and he saw the company through both world wars, became a noted community leader, and was a co-founder of the Mariners Museum with Archer Huntington. He served until July 31,1946, after the second World War had ended on both the European and Pacific fronts
8.
Ceremonial ship launching
–
Ceremonial ship launching is the process of transferring a vessel to the water. It is a tradition in many cultures, dating back thousands of years. It has been observed as a celebration and a solemn blessing. The process also involves many traditions intended to invite good luck, such as christening by breaking a bottle of champagne over the bow as the ship is named aloud. There are three methods of conveying a new ship from building site to water, only two of which are called launching. The oldest, most familiar, and most widely used is the launch, in which the vessel slides down an inclined slipway. With the side launch, the ship enters the water broadside and this method came into use in the 19th-century on inland waters, rivers, and lakes, and was more widely adopted during World War II. The third method is float-out, used for ships that are built in basins or dry docks and then floated by admitting water into the dock. In all cases, heavy chains are attached to the ship, normally, ways are arranged perpendicular to the shore line and the ship is built with its stern facing the water. The barricades support the two launch ways, the vessel is built upon temporary cribbing that is arranged to give access to the hulls outer bottom and to allow the launchways to be erected under the complete hull. When it is time to prepare for launching, a pair of standing ways is erected under the hull, the surface of the ways is greased. A pair of sliding ways is placed on top, under the hull, the weight of the hull is then transferred from the build cribbing onto the launch cradle. On launching, the vessel slides backwards down the slipway on the ways until it floats by itself, some slipways are built so that the vessel is side-on to the water and is launched sideways. This is done where the limitations of the channel would not allow lengthwise launching. The Great Eastern designed by Brunel was built this way as were many landing craft during World War II and this method requires many more sets of ways to support the weight of the ship. Sometimes ships are launched using a series of inflated tubes underneath the hull and this procedure has the advantages of requiring less permanent infrastructure, risk, and cost. The airbags provide support to the hull of the ship and aid its launching motion into the water and these airbags are usually cylindrical in shape with hemispherical heads at both ends. The Xiao Qinghe shipyard launched a tank barge with marine airbags on January 20,1981, egyptians, Greeks, and Romans called on their gods to protect seamen
9.
Song dynasty
–
The Song dynasty was an era of Chinese history that began in 960 and continued until 1279. It succeeded the Five Dynasties and Ten Kingdoms period, coincided with the Liao and Western Xia dynasties and it was the first government in world history to issue banknotes or true paper money nationally and the first Chinese government to establish a permanent standing navy. This dynasty also saw the first known use of gunpowder, as well as the first discernment of true north using a compass, the Song dynasty is divided into two distinct periods, Northern and Southern. During the Northern Song, the Song capital was in the city of Bianjing. The Southern Song refers to the period after the Song lost control of its half to the Jurchen Jin dynasty in the Jin–Song Wars. During this time, the Song court retreated south of the Yangtze, the Southern Song dynasty considerably bolstered its naval strength to defend its waters and land borders and to conduct maritime missions abroad. To repel the Jin, and later the Mongols, the Song developed revolutionary new military technology augmented by the use of gunpowder, in 1234, the Jin dynasty was conquered by the Mongols, who took control of northern China, maintaining uneasy relations with the Southern Song. Möngke Khan, the fourth Great Khan of the Mongol Empire and his younger brother Kublai Khan was proclaimed the new Great Khan, though his claim was only partially recognized by the Mongols in the west. In 1271, Kublai Khan was proclaimed the Emperor of China, after two decades of sporadic warfare, Kublai Khans armies conquered the Song dynasty in 1279. The Mongol invasion led to a reunification under the Yuan dynasty, the population of China doubled in size during the 10th and 11th centuries. The Northern Song census recorded a population of roughly 50 million, much like the Han and this data is found in the Standard Histories. However, it is estimated that the Northern Song had a population of some 100 million people and this dramatic increase of population fomented an economic revolution in pre-modern China. The expansion of the population, growth of cities, and the emergence of a national economy led to the withdrawal of the central government from direct involvement in economic affairs. The lower gentry assumed a role in grassroots administration and local affairs. Appointed officials in county and provincial centers relied upon the gentry for their services, sponsorship. Social life during the Song was vibrant, citizens gathered to view and trade precious artworks, the populace intermingled at public festivals and private clubs, and cities had lively entertainment quarters. The spread of literature and knowledge was enhanced by the expansion of woodblock printing. Technology, science, philosophy, mathematics, and engineering flourished over the course of the Song, although the institution of the civil service examinations had existed since the Sui dynasty, it became much more prominent in the Song period
10.
USS United States (CVA-58)
–
USS United States was to be the lead ship of a new design of aircraft carrier. On 29 July 1948, President Harry Truman approved construction of five supercarriers, the keel of the first of the five planned postwar carriers was laid down on 18 April 1949 at Newport News Drydock and Shipbuilding. The program was canceled, United States was not completed, nevertheless, USS United States is the ancestor of all U. S. supercarriers. The chief proponent for the new carrier was Admiral Marc Mitscher. He wanted a carrier that would be able to handle the most effective weapons of the day, early design discussions centered around developing a carrier that would be able to support combat missions using the new jet aircraft. These were faster, larger and significantly heavier than the aircraft the Essex and it was thought that the aircraft carried would have to have longer range to allow the carrier to operate farther away from the target. The deck would have to be able to handle the weight of the jet aircraft landing on the deck. Furthermore, the experience gained against the Kamikazes at the end of the war drove home the need for the ship to have a flight deck. Too many pilots had been lost from kamikaze attack while they were sitting below the flight deck in the pilot ready room. The implication then is that the strength deck would have to be the flight deck rather than the hangar deck. That would mean the ship would have a tendency to roll in rough weather. Based on the size of the aircraft that the new ship was to carry and this was done to create more space for large winged aircraft. The flush-deck design carried with it two major areas of concern, the first was concern over how smoke from the power plants would be diverted away from the flight deck. This had been an issue with the US Navys first aircraft carrier, USS Langley. The second was the placement of warning radar equipment to allow the ship to detect incoming attacks. One solution was for a ship to be close by which would carry the commander of the task force. The command ship would radio information and orders from its command center over to the carrier. A second was for the ship to aircraft that could fly the early warning radar
11.
Dry dock
–
A dry dock is a narrow basin or vessel that can be flooded to allow a load to be floated in, then drained to allow that load to come to rest on a dry platform. Dry docks are used for the construction, maintenance, and repair of ships, boats, the use of dry docks in China goes at least as far back the 10th century A. D. The upper works included several decks with cabins and saloons. After many years, their hulls decayed and needed repairs, so in the Hsi-Ning reign period a palace official Huang Huai-Hsin suggested a plan. A large basin was excavated at the end of the Chin-ming Lake capable of containing the dragon ships. Then so that the quickly filled with water, after which the ships were towed in above the beams. The the water was pumped out by wheels so that the ships rested quite in the air, when the repairs were complete, the water was let in again, so that the ships were afloat once more. The first English and oldest surviving dry dock still in use was commissioned by Henry VII of England at HMNB Portsmouth in 1495 and this dry dock currently holds the worlds oldest commissioned warship, HMS Victory. Possibly the earliest description of a floating dock comes from a small Italian book printed in Venice in 1560, called Descrittione dellartifitiosa machina. In the booklet, an unknown author asks for the privilege of using a new method for the salvaging of a ship and then proceeds to describe. The included woodcut shows a ship flanked by two large floating trestles, forming a roof above the vessel, the ship is pulled in an upright position by a number of ropes attached to the superstructure. The Alfredo da Silva Dry Dock, of the Lisnave Dockyards in Almada, Portugal, was the largest in the world until 2000, harland and Wolff Heavy Industries in Belfast, Northern Ireland, is the site of a large dry dock 556 by 93 metres. The massive cranes are named after the Biblical figures Samson and Goliath, Goliath stands 96 m tall, while Samson is taller at 106 m. The Saint-Nazaires Chantiers de lAtlantique owns one of the biggest in the world,1,200 by 60 metres, the largest graving dock of the Mediterranean as of 2009 is at the Hellenic Shipyards S. A. The largest roofed dry dock is at the German Meyer Werft Shipyard in Papenburg, Germany, it is 504 m long,125 m wide, Dry Dock 12 at Newport News Shipbuilding is 662 by 76 metres the largest dry dock in the USA. The largest floating-dock in North America named The Vigorous and it is operated Vigor Industries in Portland, OR, in the Swan Island industrial area along the Willamette River. The keel blocks as well as the block are placed on the floor of the dock in accordance with the docking plan of the ship. Routine use of dry docks is for the graving i. e. the cleaning, removal of barnacles and rust, some fine-tuning of the ships position can be done by divers while there is still some water left to manoeuvre it about
_during_a_keel_laying_and_authentication_ceremony.jpg)
_being_laid_in_a_construction_dry_dock_on_18_April_1948.jpg)
