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Axe Bow
The axe bow is a wave-piercing type of a ship's bow, characterised by a vertical stem and a relatively long and narrow entry (front hull). The forefoot is deep and the freeboard relatively high, with little flare, so that the bow profile resembles an axe. The bow cuts through the water, and is less affected by passing through waves than a bow with more flare, making this bow type much less susceptible to pitching. Because the deep forefoot does not generally rise above the water level, it is less susceptible to slamming. The axe bow moves the centre of lateral area forwards and the vessel may need considerably more rudder motion to hold its course, and this increases with the wave steepness. A vertical prow is not unique; they were common in the early steam era. The innovation of the axe bow is combined with a lengthened bow of the ship. This concept was developed in the Netherlands by Lex Keuning of Delft University of Technology, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Netherlands Sea Rescue Institution
The Royal Netherlands Sea Rescue Institution (Dutch: ''Koninklijke Nederlandse Redding Maatschappij'', abbreviated: ''KNRM'') is the voluntary organization in the Netherlands tasked with saving lives at sea. For that purpose, it maintains 45 lifeboat stations along the Dutch coast of the North Sea and Wadden Sea and on the IJsselmeer. It maintains 78 boats ranging from small boat to 21 meter long RHIBs. It also provides lifeguard services at some beaches on the Frisian Islands in the Waddensea, and the beach of Wassenaar. Its headquarters have been in IJmuiden since 1996. The KNRM was created May 22, 1991 by merging the Koninklijke Noord- en Zuid-Hollandsche Redding-Maatschappij (founded November 11, 1824), called the ''Noord'' (North), and the Koninklijke Zuid-Hollandsche Maatschappij tot Redding van Schipbreukelingen (founded November 20, 1824), called the ''Zuid'' (South). Between 1824 and 2006, they answered 36358 distress calls and saved 79887 people out of distress situati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norwegian University Of Science And Technology
Norwegian, Norwayan, or Norsk may refer to: *Something of, from, or related to Norway, a country in northwestern Europe *Norwegians, both a nation and an ethnic group native to Norway *Demographics of Norway *The Norwegian language, including the two official written forms: **Bokmål, literally "book language", used by 85–90% of the population of Norway **Nynorsk, literally "New Norwegian", used by 10–15% of the population of Norway *The Norwegian Sea Norwegian or may also refer to: Norwegian *Norwegian Air Shuttle, an airline, trading as Norwegian **Norwegian Long Haul, a defunct subsidiary of Norwegian Air Shuttle, flying long-haul flights *Norwegian Air Lines, a former airline, merged with Scandinavian Airlines in 1951 *Norwegian coupling, used for narrow-gauge railways *Norwegian Cruise Line, a cruise line *Norwegian Elkhound, a canine breed. *Norwegian Forest cat, a domestic feline breed *Norwegian Red, a breed of dairy cattle *Norwegian Township, Schuylkill County, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JFE Holdings
is a corporation headquartered in Tokyo, Japan. It was formed in 2002 by the merger of and and owns JFE Steel, JFE Engineering and Japan Marine United. JFE is from Japan, Fe (the chemical element symbol of iron) and Engineering. In 2020, it is ranked 365th in Fortune Global 500 List. Mergers and Spinoffs At the time JFE Holdings was created in 2002, NKK Corporation was Japan's second largest steelmaker and Kawasaki Steel was the third largest steelmaker. Both companies were major military vessel manufacturers during World War II. JFE's main business is steel production. It also engages in engineering, ship building, real-estate redevelopment, and LSi business. The company also operates several overseas subsidiaries, including California Steel Industries in the United States, Fujian Sino-Japan Metal in China, and Minas da Serra Geral in Brazil. Other than steel, they are also known for products such as the bicycle tree. JFE Holdings owns JFE Steel, the fifth largest steel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prow
The bow () is the forward part of the hull of a ship or boat, the point that is usually most forward when the vessel is underway. The aft end of the boat is the stern. Prow may be used as a synonym for bow or it may mean the forward-most part of the bow above the waterline. Function A ship's bow should be designed to enable the hull to pass efficiently through the water. Bow shapes vary according to the speed of the boat, the seas or waterways being navigated, and the vessel's function. Where sea conditions are likely to promote pitching, it is useful if the bow provides reserve buoyancy; a flared bow (a raked stem with flared topsides) is ideal to reduce the amount of water shipped over the bow. Ideally, the bow should reduce the resistance and should be tall enough to prevent water from regularly washing over the top of it. Large commercial barges on inland waterways rarely meet big waves and may have remarkably little freeboard at the bow, whereas fast military ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulbous Bow
A bulbous bow is a protruding bulb at the bow (or front) of a ship just below the waterline. The bulb modifies the way the water flows around the hull, reducing drag and thus increasing speed, range, fuel efficiency, and stability. Large ships with bulbous bows generally have twelve to fifteen percent better fuel efficiency than similar vessels without them. A bulbous bow also increases the buoyancy of the forward part and hence reduces the pitching of the ship to a small degree. Vessels with high kinetic energy, which is proportional to mass and the square of the velocity, benefit from having a bulbous bow that is designed for their operating speed; this includes vessels with high mass (e.g. supertankers) or a high service speed (e.g. passenger ships, and cargo ships). Vessels of lower mass (less than 4,000 dwt) and those that operate at slower speeds (less than 12 kts) have a reduced benefit from bulbous bows, because of the eddies that occur in those cases; examples include ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Coast Guard
The United States Coast Guard (USCG) is the maritime security, search and rescue, and law enforcement service branch of the United States Armed Forces and one of the country's eight uniformed services. The service is a maritime, military, multi-mission service unique among the United States military branches for having a maritime law enforcement mission with jurisdiction in both domestic and international waters and a federal regulatory agency mission as part of its duties. It is the largest and most powerful coast guard in the world, rivaling the capabilities and size of most navies. The U.S. Coast Guard is a humanitarian and security service. It protects the United States' borders and economic and security interests abroad; and defends its sovereignty by safeguarding sea lines of communication and commerce across vast territorial waters spanning 95,000 miles of coastline and its Exclusive Economic Zone. With national and economic security depending upon open global trade a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Damen Schelde Naval Shipbuilding
Damen Naval is a Dutch shipyard, and a continuation of the Koninklijke Maatschappij De Schelde, responsible for a number of ships used by the Royal Netherlands Navy. It is owned by the Damen Group. Damen Naval is situated in Vlissingen. History The company was founded October 8, 1875, as the ''NV Koninklijke Maatschappij De Schelde'' (KMS) after shipbuilder Arie Smit had taken over the ''Marine Etablissement'' the wharf owned by the Dutch navy. Besides shipbuilding and repair, the company also builds machines, engines, steam turbines, airplanes, and light-metal products. Koninklijk is a royal title granted by the Monarchy of the Netherlands, Dutch Crown. In 1965 the company merged with the NV Rotterdamsche Droogdok Maatschappij (RDM) and the NV Motorenfabriek Thomassen of De Steeg, which resulted in the founding, on March 4, 1966, of the Rijn-Schelde, Rijn-Schelde Machinefabrieken en Scheepswerven NV (RSMS). Pressured by the Dutch government the Verolme Verenigde Scheepswerven NV ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Netherlands Navy
The Royal Netherlands Navy ( nl, Koninklijke Marine, links=no) is the naval force of the Kingdom of the Netherlands. During the 17th century, the navy of the Dutch Republic (1581–1795) was one of the most powerful naval forces in the world and played an active role in the Anglo-Dutch Wars, the Franco-Dutch War, and wars against Spain and several other European powers. The Batavian Navy of the later Batavian Republic (1795–1806) and Kingdom of Holland (1806–1810) played an active role in the Napoleonic Wars, though mostly dominated by French interests. After the establishment of the modern Kingdom of the Netherlands, it served an important role in protecting Dutch colonial rule, especially in Southeast Asia, and would play a minor role in World War II, especially against the Imperial Japanese Navy. Since World War II, the Royal Netherlands Navy has taken part in expeditionary peacekeeping operations. Bases The main naval base is in Den Helder, North Holland. Secondary na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maritime Research Institute Netherlands
MARIN, the Maritime Research Institute Netherlands, is one of the leading institutes in the world for hydrodynamic research and maritime technology. The services incorporate a unique combination of simulation, model testing, full-scale measurements and training programmes. MARIN provides services to the shipbuilding and offshore industry and governments. Customers include commercial ship builders, fleet owners, naval architects, classification societies, oil and LNG companies and navies all over the world. In the Netherlands MARIN has the status of Great Technological Institute, thus linking science and applied knowledge. Results from fundamental research are directly integrated in applications for clients. Over 85% of the turnover is realised by commercial projects for the international maritime industry. The remaining 15% is derived from scientific research. Offices MARIN’s head office is in Wageningen, with additional offices in Ede, Houston, and Annapolis. The institute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wave-piercing
A wave-piercing boat hull has a very fine bow, with reduced buoyancy in the forward portions. When a wave is encountered, the lack of buoyancy means the hull pierces through the water rather than riding over the top, resulting in a smoother ride than traditional designs, and in diminished mechanical stress on the vessel. It also reduces a boat's wave-making resistance. Design theory calls for very long thin hulls, so in practice most are multi-hulls such as catamarans and trimarans. The main current usage areas are passenger ferries and naval ship A naval ship is a military ship (or sometimes boat, depending on classification) used by a navy A navy, naval force, or maritime force is the branch of a nation's armed forces principally designated for naval warfare, naval and amph ...s. See also * * * , later renamed MY ''Ady Gil'' * * * , a pioneer of the design * * Norwegian Cruise Line -Class Cruise Ships * hull form * * * : an racing multihull * : ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Damen Group
The Damen Group is a Dutch defence, shipbuilding, and engineering conglomerate company based in Gorinchem, Netherlands. Though it is a major international group doing business in 120 countries, it remains a private family-owned company. Damen Shipyards Group is a globally operating company with more than 50 shipyards, repair yards, and related companies − as well as numerous partner yards that can build Damen vessels locally. Since 1969 it has designed and built more than 5,000 vessels and delivers over 150 vessels annually. With over 30 shipyards and related companies worldwide, Damen is involved in ship construction as well as maintenance and repair activities. It has a wide product range, including tugs, workboats, patrol craft, cargo vessels, dredgers, superyachts and fast ferries. Product design and engineering are carried out in-house and a broad range of designs are available. History Overview Damen was established in 1927 in the town of Hardinxveld-Giessendam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
