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MV Stena Hollandica
Stena Hollandica, launched in January 2010, is the first of two identical Ropax ferries built by Wadan Yards in Warnemünde and nearby Wismar, Germany for Stena Line.RoPax-Fähre bei Wadan Yards aufgeschwommen', Schiff&Hafen, 10 June 2010. Retrieved 1 July 2013. The second of the two ships, launched towards the end of 2010, is '' Stena Britannica''. Both ships operate (2012) across the southern North Sea between Harwich and Hook of Holland providing a twice daily service (taking seven hours) from each side. The ships were specifically designed for this route. Power and its transmission ''Stena Hollandica'' has four main MAN diesel engines, producing between them 33,600 kW, and providing for a maximum speed of 22 knots (25 mph). Two of the engines are rated at 9,600 kW and the other two at 7,200 kW. The engines are connected via two gearboxes to two controllable pitch propellers. The two rudders, one behind each propeller, are of the Becker flap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stena Line
Stena Line is a Swedish shipping line company and one of the largest ferry operators in the world. It services Denmark, Germany, the United Kingdom, Ireland, Latvia, the Netherlands, Norway, Poland and Sweden. Stena Line is a major unit of Stena AB, itself a part of the Stena Sphere. History Formation Stena Line was founded in 1962 by Sten A. Olsson in Gothenburg, Sweden, which still serves as the company's headquarters, when he acquired Skagenlinjen between Gothenburg and Frederikshavn, Denmark. In 1972, Stena Line was one of the first ferry operators in Europe to introduce a computer-based reservation system for the travel business area. In 1978, the freight business area also started operating a computer-based reservation system. Freight The first freight-focused route started between Gothenburg, Sweden, and Kiel, Germany. The ship was the MS ''Stena Transporter''. North Sea During the 1980s, Stena acquired three other ferry companies. * 1981, Sessan Line, Stena's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Propulsion
Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats, most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller, or less frequently, in pump-jets, an impeller. Marine engineering is the discipline concerned with the engineering design process of marine propulsion systems. Human-powered paddles and oars, and later, sails were the first forms of marine propulsion. Rowed galleys, some equipped with sail, played an important early role in early human seafaring and warfares. The first advanced mechanical means of marine propulsion was the marine steam engine, introduced in the early 19th century. During the 20th century it was replaced by two-stroke or four-stroke diesel engines, outboard motors, and gas turbine engines on faster ships. Marine nuclear reactors, which appeared in the 1950s, pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferries Of England
A ferry is a ship, watercraft or amphibious vehicle used to carry passengers, and sometimes vehicles and cargo, across a body of water. A passenger ferry with many stops, such as in Venice, Italy, is sometimes called a water bus or water taxi. Ferries form a part of the public transport systems of many waterside cities and islands, allowing direct transit between points at a capital cost much lower than bridges or tunnels. Ship connections of much larger distances (such as over long distances in water bodies like the Mediterranean Sea) may also be called ferry services, and many carry vehicles. History In ancient times The profession of the ferryman is embodied in Greek mythology in Charon, the boatman who transported souls across the River Styx to the Underworld. Speculation that a pair of oxen propelled a ship having a water wheel can be found in 4th century Roman literature "''Anonymus De Rebus Bellicis''". Though impractical, there is no reason why it could not work ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2009 Ships
9 (nine) is the natural number following and preceding . Evolution of the Arabic digit In the beginning, various Indians wrote a digit 9 similar in shape to the modern closing question mark without the bottom dot. The Kshatrapa, Andhra and Gupta started curving the bottom vertical line coming up with a -look-alike. The Nagari continued the bottom stroke to make a circle and enclose the 3-look-alike, in much the same way that the sign @ encircles a lowercase ''a''. As time went on, the enclosing circle became bigger and its line continued beyond the circle downwards, as the 3-look-alike became smaller. Soon, all that was left of the 3-look-alike was a squiggle. The Arabs simply connected that squiggle to the downward stroke at the middle and subsequent European change was purely cosmetic. While the shape of the glyph for the digit 9 has an ascender in most modern typefaces, in typefaces with text figures the character usually has a descender, as, for example, in . The mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nordic Yards Wismar
Lloyd Werft Wismar (former '' VEB Mathias-Thesen-Werft Wismar'', ''Aker MTW Werft'', ''Wadan Yards MTW'', ''Nordic Yards Wismar'') is a German shipbuilding company, headquartered in Wismar. Since June 1, 1990 it has been part of the Deutschen Maschinen- und Schiffbau AG (DMS AG), 2009–2016 was part of the Nordic Yards Holding GmbH, and since 2016 is part of the Lloyd Werft Group. History The ship repair yard was founded by Red Army on April 27, 1946. The ''Ivan Susanin'' was the first ship repaired at this yard. The shipyard developed quickly, from Soviet ship repair yard to VVB Schiffsreparaturwerft Wismar, in 1948, renamed to Hochseeschiffbau Mathias-Thesen-Werft Wismar VEB, in 1951. The first new ship ''V. Chkalov'' was built for the Soviet Union as war reparations after World War II on March 30, 1954. In 2016, Genting Hong Kong purchased Nordic Yards Wismar and combined it with the Nordic Yards Warnemunde and Stralsund shipyards and the German Lloyd Werft shipyard to form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linkspan
A linkspan or link-span is a type of drawbridge used mainly in the operation of moving vehicles on and off a roll-on/roll-off (RO-RO) vessel or ferry, particularly to allow for tidal changes in water level. Linkspans are usually found at ferry terminals where a vessel uses a combination of ramps either at the stern, bow or side to load or unload cars, vans, trucks and buses onto the shore, or alternately at the stern and/or the bow to load or unload railroad cars. History The first linkspans appeared at the end of the 19th century when train ferries came into operation. Each rail ferry berth has to be specifically designed to make sure that it fitted one class of ship. In most of these vessels it was also possible to carry some road vehicles. By the mid 20th century with the rise of road transport, general purpose Ro Ro ferries started to come into service. Most could use the rail ferry berths but generally they were fitted with stern ramps that had the dual function of gi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bow Thruster
Manoeuvering thruster (bow thruster or stern thruster) is a transversal propulsion device built into, or mounted to, either the bow or stern, of a ship or boat to make it more manoeuvrable. Bow thrusters make docking easier, since they allow the captain to turn the vessel to port or starboard side, without using the main propulsion mechanism which requires some forward motion for turning; The effectiveness of a thruster is curtailed by any forward motion due to the Coandă effect. A stern thruster is of the same principle, fitted at the stern. Large ships might have multiple bow thrusters and stern thrusters. Tunnel thrusters Large vessels usually have one or more tunnel thrusters built into the bow, below the waterline. An impeller in the tunnel can create thrust in either direction that makes the ship turn. Most tunnel thrusters are driven by electric motors, but some are hydraulically powered. These bow thrusters, also known as tunnel thrusters, may allow the ship to doc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rudder
A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, aircraft, or other vehicle that moves through a fluid medium (generally aircraft, air or watercraft, water). On an aircraft the rudder is used primarily to counter adverse yaw and p-factor and is not the primary control used to turn the airplane. A rudder operates by redirecting the fluid past the hull (watercraft), hull or fuselage, thus imparting a turning or yaw (rotation), yawing motion to the craft. In basic form, a rudder is a flat plane or sheet of material attached with hinges to the craft's stern, tail, or after end. Often rudders are shaped so as to minimize Drag (physics), 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 air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Controllable Pitch Propeller
In marine propulsion, a variable-pitch propeller is a type of propeller with blades that can be rotated around their long axis to change the blade pitch. Reversible propellers—those where the pitch can be set to negative values—can also create reverse thrust for braking or going backwards without the need to change the direction of shaft revolution. A controllable pitch propeller (CPP) can be efficient for the full range of rotational speeds and load conditions, since its pitch will be varied to absorb the maximum power that the engine is capable of producing. When fully loaded, a vessel will need more propulsion power than when empty. By varying the propeller blades to the optimal pitch, higher efficiency can be obtained, thus saving fuel. A vessel with a VPP can accelerate faster from a standstill and can decelerate much more effectively, making stopping quicker and safer. A CPP can also improve vessel maneuverability by directing a stronger flow of water onto the ru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knot (unit)
The knot () is a unit of speed equal to one nautical mile per hour, exactly (approximately or ). The ISO standard symbol for the knot is kn. The same symbol is preferred by the Institute of Electrical and Electronics Engineers (IEEE), while kt is also common, especially in aviation, where it is the form recommended by the International Civil Aviation Organization (ICAO). The knot is a non- SI unit. The knot is used in meteorology, and in maritime and air navigation. A vessel travelling at 1 knot along a meridian travels approximately one minute of geographic latitude in one hour. Definitions ;1 international knot = :1 nautical mile per hour (by definition), : (exactly), : (approximately), : (approximately), : (approximately) : (approximately). The length of the internationally agreed nautical mile is . The US adopted the international definition in 1954, having previously used the US nautical mile (). The UK adopted the international nautical mile definition in 1970, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watt
The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Watt (1736–1819), an 18th-century Scottish inventor, mechanical engineer, and chemist who improved the Newcomen engine with his own steam engine in 1776. Watt's invention was fundamental for the Industrial Revolution. Overview When an object's velocity is held constant at one metre per second against a constant opposing force of one newton, the rate at which work is done is one watt. : \mathrm In terms of electromagnetism, one watt is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potential difference of one volt (V), meaning the watt is equivalent to the volt-ampere (the latter unit, however, is used for a different quantity from the real power of an electrical circuit). : ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MAN Diesel
MAN Diesel SE was a German manufacturer of large-bore diesel engines for marine propulsion systems and power plant applications. In 2010 it was merged with MAN Turbo to form MAN Diesel & Turbo. History * In 1980, MAN acquired the Burmeister & Wain Danish shipyard and diesel engine producer. Though engine production at Christianshavn was later discontinued in 1987, successful engine programs were rolled out. At Teglholmen in 1988 a spare parts and key components production factory was established as was an R&D Centre at the same site in 1992. Though all Copenhagen operations were consolidated at Teglholmen in 1994 and the last volume production unit at the B&W Shipyard was delivered in 1996, in 2000 MAN B&W Diesel two-stroke diesel engines had over 70% market share, with a substantial number of MC-line engines on order. * The electronically controlled line of ME diesel two-stroke engines was added in 2002 with a maximum cylinder bore of 108 cm. MAN B&W Diesel, Denmark, emp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
