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Dracone
A Dracone Barge is a large flexible watertight tube intended to carry a liquid cargo while towed mostly-submerged behind a ship. One large current example of the type has a capacity of 935 cubic metres (4.23m diameter, 91m long) while weighing only 6.5 tonnes empty. The Dracone Barge was invented in 1956 by Professor William Hawthorne as a new type of oil tanker. The intent was to create an improved transport technology: the long tube can be pulled by a lower powered vessel than the equivalent tanker, the cargo can be handed off at the destination very quickly, and incurs no drag cost when empty (because it can easily be taken aboard), as compared to the similar unladen to laden drag of the rigid-hulled tanker of equivalent capacity. The daytime signal (known as a day shape) for dracone is a diamond shape at or near the aftermost extremity of the last vessel or object being towed and if the length of the tow exceeds 200 meters an additional diamond shape where it can best be seen a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Hawthorne
Sir William Rede Hawthorne CBE, FRS, FREng, FIMECHE, FRAES, (22 May 1913 – 16 September 2011) was a British professor of engineering who worked on the development of the jet engine. Bragg-Hawthorne equation is named after him. Life Hawthorne was born in Newcastle-upon-Tyne, England, the son of a civil engineer from Belfast. He had two younger brothers, John and Edward. He was educated at Westminster School, London, then read mathematics and engineering at Trinity College, Cambridge, graduating in 1934 with a double first. He spent two years as a graduate apprentice with Babcock & Wilcox Ltd, then went to the Massachusetts Institute of Technology (MIT) in Cambridge, MA, where his research on laminar and turbulent flames earned him a ScD two years later. In 1939 he married Barbara Runkle (d. 1992, granddaughter of MIT's second President John Daniel Runkle), and they had one son and two daughters. After MIT, he returned to Babcock & Wilcox. In 1940, he joined the Royal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Dragon In The Sea
''The Dragon in the Sea'' (1956), also known as ''Under Pressure'' from its serialization, is a novel by Frank Herbert. It was first serialized in ''Astounding'' magazine from 1955 to 1956, then reworked and published as a standalone novel in 1956. A 1961 2nd printing of the Avon paperback, catalog # G-1092, was titled ''21st Century Sub'' with the previous title in parentheses, and a short 36 page version of the novel was later collected in ''Eye''. It is usually classified as a psychological novel. Plot In a near-future earth, the West and the East have been at war for more than a decade, and resources are running thin. The West is stealing oil from the East with specialized nuclear submarines ("subtugs") that sneak into the underwater oil fields of the East to secretly pump out the oil and bring it back. Each carrying a crew of four, these submarines undertake the most hazardous, stressful missions conceivable, and of late, the missions have been failing, with the last twen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flexible Barge
A flexible barge is a fabric barge (non-rigid) for the shipment of bulk liquids like water, chemicals or oil. Patents indicate that the inventions relate to a flexible fabric barge technology or combination of several barges made of a rubber polyurethane material. The main body portion of a flexible fabric barge is cylindrical in shape. The barge can be used by itself or as several connected flexible fabric barges that can be towed through the open ocean under extreme conditions. The basic invention is a device for the delivery of huge amounts of fresh water in each bag at one time in a hostile wind and wave environment typical of oceans and large seas. History One such barge is called the Dracone Barge invented in 1956. Other similar devices are the Spragg Bag invented in the 1980s, the water bag proposed by Nordic Water Supply in the late 1990s and the more recent REFRESH modular waterbag, developed in the 2010s. Terry Spragg (1941 - 2020) of Manhattan Beach, California, built f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Day Shape
Day shapes are mast head signals visually indicating the status of a vessel to other vessels on navigable waters during daylight hours whether making-way, anchored, or aground. These signals consist of a set of simple geometric shapes—''ball'', ''cylinder'', ''cone'', and ''diamond''—that are displayed, hung from a mast, in a prescribed manner to indicate a vessel's operational status; some of these signals may be somewhat involved. The meanings of the shapes are defined by the International Regulations for Preventing Collisions at Sea (ColRegs). Day shapes are black in color and their sizes are determined by the ColRegs; for example, the size of the ball is not less than . The vertical distance between shapes is at least . Vessels of less than length may use shapes of smaller size commensurate with the size of the vessel. Day shapes of standard and reduced sizes are both commercially available. Day shapes are commonly constructed from a light weight frame covered with fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USCG
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petroleum
Petroleum, also known as crude oil, or simply oil, is a naturally occurring yellowish-black liquid mixture of mainly hydrocarbons, and is found in geological formations. The name ''petroleum'' covers both naturally occurring unprocessed crude oil and petroleum products that consist of refined crude oil. A fossil fuel, petroleum is formed when large quantities of dead organisms, mostly zooplankton and algae, are buried underneath sedimentary rock and subjected to both prolonged heat and pressure. Petroleum is primarily recovered by oil drilling. Drilling is carried out after studies of structural geology, sedimentary basin analysis, and reservoir characterisation. Recent developments in technologies have also led to exploitation of other unconventional reserves such as oil sands and oil shale. Once extracted, oil is refined and separated, most easily by distillation, into innumerable products for direct use or use in manufacturing. Products include fuels such as gasol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harbour Tug
A tugboat or tug is a marine vessel that manoeuvres other vessels by pushing or pulling them, with direct contact or a tow line. These boats typically tug ships in circumstances where they cannot or should not move under their own power, such as in crowded harbour or narrow canals, or cannot move at all, such as barges, disabled ships, log rafts, or oil platforms. Some are ocean-going, some are icebreakers or salvage tugs. Early models were powered by steam engines, long ago superseded by diesel engines. Many have deluge gun water jets, which help in firefighting, especially in harbours. Types Seagoing Seagoing tugs (deep-sea tugs or ocean tugboats) fall into four basic categories: #The standard seagoing tug with model bow that tows almost exclusively by way of a wire cable. In some rare cases, such as some USN fleet tugs, a synthetic rope hawser may be used for the tow in the belief that the line can be pulled aboard a disabled ship by the crew owing to its lightn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bilge Water
The bilge of a ship or boat is the part of the hull that would rest on the ground if the vessel were unsupported by water. The "turn of the bilge" is the transition from the bottom of a hull to the sides of a hull. Internally, the bilges (usually used in the plural in this context) is the lowest compartment on a ship or seaplane, on either side of the keel and (in a traditional wooden vessel) between the floors. The first known use of the word is from 1513. Bilge water The word is sometimes also used to describe the water that collects in this area. Water that does not drain off the side of the deck or through a hole in the hull, typically via a scupper, drains down into the ship into the bilge. This water may be from rough seas, rain, leaks in the hull or stuffing box, or other interior spillage. The collected water must be pumped out to prevent the bilge from becoming too full and threatening to sink the ship. Bilge water can be found aboard almost every vessel. Depending ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frank Herbert
Franklin Patrick Herbert Jr. (October 8, 1920February 11, 1986) was an American science fiction author best known for the 1965 novel '' Dune'' and its five sequels. Though he became famous for his novels, he also wrote short stories and worked as a newspaper journalist, photographer, book reviewer, ecological consultant, and lecturer. The ''Dune'' saga, set in the distant future, and taking place over millennia, explores complex themes, such as the long-term survival of the human species, human evolution, planetary science and ecology, and the intersection of religion, politics, economics and power in a future where humanity has long since developed interstellar travel and settled many thousands of worlds. ''Dune'' is the best-selling science fiction novel of all time, and the entire series is considered to be among the classics of the genre. Biography Early life Frank Patrick Herbert Jr. was born on October 8, 1920, in Tacoma, Washington, to Frank Patrick Herbert Sr. and Ei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
