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St. Helena Island Light
The buildings of the St Helena Light complex are the sole surviving structures on St. Helena Island, in Mackinac County in the U.S. state of Michigan. The lighthouse on the St. Helena Island's southeastern point was built in 1872-1873 and went into operation in September 1873.National Park Servicebr>Maritime History Project, Inventory of Historic Light Stations, St. Helena Island Light. It became one of a series of lighthouses that guided vessels through the Straits of Mackinac, past a dangerous shoal that extends from the island. History St. Helena Island, which is in size, is located offshore from Gros Cap, Michigan, west of Mackinac Island in the Lake Michigan approach to the Straits of Mackinac. The island has a natural harbor on its north shore, which provided shelter for both Native Americans and voyageurs, who sought shelter from fierce, foreseeable and notorious southwesterly storms, which would drive waves that gained strength running with the lake's length. Du ... [...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 armed forces of the United States. It is 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 coast guard in the world, rivaling the capabilities and size of most navies. The U.S. Coast Guard protects the United States' borders and economic and security interests abroad; and defends its sovereignty by safeguarding sea lines of communication and commerce across U.S. territorial waters and its Exclusive Economic Zone. Due to ever-expanding risk imposed by transnational threats through the maritime and cyber domains, the U.S. Coast Guard is at any given time deployed to a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gros Cap, Michigan
Gros may refer to: People * Gros (surname) * Gross (surname), the German variant of Gros * Le Gros, the Norman variant of Gros Other uses * Gros (coinage), a type of 13th-century silver coinage of France * Gros (grape), another name for Elbling, a variety of white grape * Groș, a village of the city of Hunedoara, Transylvania, Romania * General Register Office for Scotland (GROS) See also * Gros Morne (other) Gros Morne or Gros-Morne may refer to: * Gros-Morne, Artibonite, a commune in the Artibonite department in Haiti * Gros Morne, Grand'Anse, rural settlement in the Moron commune of Haiti * Gros-Morne, Martinique, a commune in the French overseas d ... * * Gross (other) * Grosz (other) {{disambiguation ... [...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 Admiralty law, law enforcement military branch, service branch of the armed forces of the United States. It is one of the country's eight Uniformed services of the United States, 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 government of the United States, federal regulatory agency mission as part of its duties. It is the largest coast guard in the world, rivaling the capabilities and size of most Navy, navies. The U.S. Coast Guard protects the United States' borders and economic and security interests abroad; and defends its sovereignty by safeguarding sea lines of communication and commerce across U.S. territorial waters and its Exclusive economic zone, Exclusive Economic Zone. Due to ever-ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gustav Dalén
Gustav, Gustaf or Gustave may refer to: *Gustav (name), a male given name of Old Swedish origin Art, entertainment, and media * ''Primeval'' (film), a 2007 American horror film * ''Gustav'' (film series), a Hungarian series of animated short cartoons * Gustav (''Zoids''), a transportation mecha in the ''Zoids'' fictional universe *Gustav, a character in ''Sesamstraße'' *Monsieur Gustav H., a leading character in ''The Grand Budapest Hotel'' * Gustaf, an American art punk band from Brooklyn, New York. Weapons *Carl Gustav recoilless rifle The Carl Gustaf 84 mm recoilless rifle (, named after '' Carl Gustafs Stads Gevärsfaktori'', which initially produced it) is a Swedish-developed caliber shoulder-fired recoilless rifle, initially developed by the Royal Swedish Army Mate ..., dubbed "the Gustav" by US soldiers *Schwerer Gustav, 800-mm German siege cannon used during World War II Other uses *Gustav (pigeon), a pigeon of the RAF pigeon service in WWII *Gustave (crocodi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nobel Prize
The Nobel Prizes ( ; ; ) are awards administered by the Nobel Foundation and granted in accordance with the principle of "for the greatest benefit to humankind". The prizes were first awarded in 1901, marking the fifth anniversary of Alfred Nobel, Alfred Nobel's death. The original Nobel Prizes covered five fields: Nobel Prize in Physics, physics, Nobel Prize in Chemistry, chemistry, Nobel Prize in Physiology or Medicine, physiology or medicine, Nobel Prize in Literature, literature, and Nobel Peace Prize, peace, specified in Nobel's will. A sixth prize, the Nobel Memorial Prize in Economic Sciences, Prize in Economic Sciences, was established in 1968 by Sveriges Riksbank (Sweden's central bank) in memory of Alfred Nobel. The Nobel Prizes are widely regarded as the most prestigious awards available in their respective fields.Nobel Prize#Shalev69, Shalev, p. 8. Except in extraordinary circumstances, such as war, all six prizes are given annually. Each recipient, known as a laur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sun Valve
A sun valve (''Swedish: solventil'', "solar valve") is a flow control valve that automatically shuts off gas flow during daylight. It earned its inventor Gustaf Dalén the 1912 Nobel Prize in Physics. Subsequently other variants of sun valve were developed for different uses. Dalén's valve The valve was the key component of the Dalén light used in lighthouses from the 1900s through the 1960s, by which time electric lighting was dominant. Prominent engineers, such as Thomas Edison, doubted that the device could work. The German patent office required a demonstration before approving the patent application. Design The valve is controlled by four metal rods enclosed in a glass tube. The central rod that is blackened is surrounded by the three polished rods. As sunlight falls onto all of the rods, the absorbed heat of the sun expands the dark rod, switching a valve to cut the gas supply. After sunset, the central rod cools down, contracting to become the same length as the pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acetylene
Acetylene (Chemical nomenclature, systematic name: ethyne) is a chemical compound with the formula and structure . It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block. It is unstable in its pure form and thus is usually handled as a solution. Pure acetylene is odorless, but commercial grades usually have a marked odor due to impurities such as divinyl sulfide and phosphine.Compressed Gas Association (1995Material Safety and Data Sheet – Acetylene As an alkyne, acetylene is Saturated and unsaturated compounds, unsaturated because its two carbon atoms are Chemical bond, bonded together in a triple bond. The carbon–carbon triple bond places all four atoms in the same straight line, with CCH bond angles of 180°. The triple bond in acetylene results in a high energy content that is released when acetylene is burned. Discovery Acetylene was discovered in 1836 by Edmund Davy, who identified it as a "new carburet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouse Keeper
A lighthouse keeper or lightkeeper is a person responsible for tending and caring for a lighthouse, particularly the light and lens in the days when oil lamps and clockwork mechanisms were used. Lighthouse keepers were sometimes referred to as "wickies" because of their job trimming the wicks. Duties and functions Historically, lighthouse keepers were needed to trim the wicks, replenish fuel, wind clockworks and perform maintenance tasks such as cleaning lenses and windows. They were also responsible for the fog signal and the weather station, and played a major role in search and rescue at sea. Because most lighthouses are located in remote, isolated or inaccessible areas on islands and coastlines, it was typical for the work of lighthouse keeper to remain within a family, passing from parents to child, all of whom lived in or near the lighthouse itself. "Stag light" was an unofficial term given to some isolated lighthouses in the United States Lighthouse Service. It meant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boatnerd
The Boatnerd corporation is a registered not-for-profit corporation intended to spread information about vessels that ply the North American Great Lakes. Services The organization holds annual festivals at sites of interest to those interested in maritime commerce on the Great Lakes. ''The Globe and Mail'' profiled Boatnerd when the 2008 festival was held in a shipyard in Port Colborne, Ontario, where the ''Calumet'', an 80-year-old lake freighter was being scrapped. According to ''The Globe and Mail'' the site's volunteers often report breaking news prior to its announcement by official authorities. ''The Globe and Mail'' quoted a volunteer who described how, while professional mariners kidded the volunteers, they obviously monitored it, because they could count on regular mariners promptly informing them when they had made a mistake. The organization maintains an office in Port Huron, Michigan, overlooking the confluence of the St Clair and Black Rivers. The site went ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reef
A reef is a ridge or shoal of rock, coral, or similar relatively stable material lying beneath the surface of a natural body of water. Many reefs result from natural, abiotic component, abiotic (non-living) processes such as deposition (geology), deposition of sand or wave erosion planning down rock outcrops. However, reefs such as the coral reefs of tropical waters are formed by biotic component, biotic (living) processes, dominated by corals and coralline algae. Artificial reefs, such as shipwrecks and other man-made underwater structures, may occur intentionally or as the result of an accident. These are sometimes designed to increase the physical complexity of featureless sand bottoms to attract a more diverse range of organisms. They provide shelter to various aquatic animals which help prevent extinction. Another reason reefs are put in place is for aquaculture, and fish farmers who are looking to improve their businesses sometimes invest in them. Reefs are often quite n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Lighthouse Board
The United States Lighthouse Board was the second agency of the U.S. federal government, under the Department of Treasury, responsible for the construction and maintenance of all lighthouses and navigation aids in the United States, between 1852 and 1910. The new agency was created following complaints of the shipping industry of the previous administration of lighthouses under the Treasury's Lighthouse Establishment, which had had jurisdiction since 1791, and since 1820, been under the control of Stephen Pleasonton. The quasi-military board first met on April 28, 1851, and with its establishment, the administration of lighthouses and other aids to navigation would take their largest leap toward modernization since the inception of federal government control.Amy K. Marshall "Frequently Close to the Point of Peril: A History of Buoys and Tenders in U.S. Coastal Waters, 1789–1939'", A Master's Thesis In 1910, the Lighthouse Board was disestablished in favor of a more civilia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coureurs De Bois
A coureur des bois (; ) or coureur de bois (; ) were independent entrepreneurial French Canadian traders who travelled in New France and the interior of North America, usually to trade with First Nations peoples by exchanging various European items for furs. Sometimes they operated in competition with the larger and licensed ''voyageurs''. Some coureur des bois learned the trades and practices of the indigenous peoples, and even went into business with them. These expeditions were part of the beginning of the fur trade in the North American interior. Initially they traded for beaver coats and furs. However, as the market grew, ''coureurs de bois'' were trapping and trading prime beavers whose skins were to be felted in Europe. Evolution While French settlers had lived and traded alongside Indigenous people since the earliest days of New France, coureurs des bois reached their apex during the second half of the 17th century. After 1681, the independent coureur des bois was gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
