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Cheboygan Crib Light
The Cheboygan Crib Light is a light that marks the west pier head of the mouth of the Cheboygan River into Lake Huron. The pier head, in the center of the municipality of Cheboygan, is located at the north or lake end of Huron Street, and is one of the centerpieces of Cheboygan's Gordon Turner Park. History 1884-1920: manned light The Crib Light is called a "light" rather than a "lighthouse" because it does not contain a structure in which a keeper lived. The Light was originally built in Lake Huron in 1884 on a "crib", an artificial-island landfill, more than from the Cheboygan shore. It is assumed that the keeper lived in Cheboygan; this would have required him to boat daily to the crib, despite weather conditions, to maintain the kerosene-fired light. This was hazardous duty, and in due course davits were installed on the Crib Light; this enabled a boat making dock at the crib to be raised, more easily unloaded, and be protected from the waves. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheboygan, Michigan
Cheboygan ( ) is a city in the U.S. state of Michigan. As of the 2010 census, the city population was 4,876. It is the county seat of Cheboygan County. The name of the city shares the name of the county and probably has its origin from the Cheboygan River, although the precise meaning is no longer known. It may have come from an Ojibwe word ''zhaabonigan'' meaning "sewing needle". Alternatively, the origin may have been "Chabwegan," meaning "a place of ore." The city is at the mouth of the Cheboygan River on Lake Huron. U.S. Highway 23 (US 23) connects with Interstate 75 (I-75) at Mackinaw City and the Mackinac Bridge, about to the northwest. Rogers City is about to the southeast. M-27 runs south from the city along the north shore of Mullett Lake to I-75 at Indian River about to the southwest. M-33 runs due south along the east shore of Mullett Lake to M-68 about to the south. History Cheboygan was originally an Ojibwe settlement. In 1844, Jacob Sammons, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acetylene
Acetylene (systematic name: ethyne) is the 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 unsaturated because its two carbon atoms are 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°. Discovery Acetylene was discovered in 1836 by Edmund Davy, who identified it as a "new carburet of hydrogen". It was an accidental discovery while attempting to isolate potassium metal. By heating potassium carbonate with carbon at very high temperatures, he produced a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouses In Michigan
A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lens (optics), lenses and to serve as a beacon for navigational aid, for maritime pilots at sea or on inland waterways. Lighthouses mark dangerous coastlines, hazardous shoals, reefs, rocks, and safe entries to harbors; they also assist in aerial navigation. Once widely used, the number of operational lighthouses has declined due to the expense of maintenance and has become uneconomical since the advent of much cheaper, more sophisticated and effective electronic navigational systems. History Ancient lighthouses Before the development of clearly defined ports, mariners were guided by fires built on hilltops. Since elevating the fire would improve the visibility, placing the fire on a platform became a practice that led to the development of the lighthouse. In antiquity, the lighthouse functioned more as an entrance marker to ports than as a warning signa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouses Completed In 1884
A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lenses and to serve as a beacon for navigational aid, for maritime pilots at sea or on inland waterways. Lighthouses mark dangerous coastlines, hazardous shoals, reefs, rocks, and safe entries to harbors; they also assist in aerial navigation. Once widely used, the number of operational lighthouses has declined due to the expense of maintenance and has become uneconomical since the advent of much cheaper, more sophisticated and effective electronic navigational systems. History Ancient lighthouses Before the development of clearly defined ports, mariners were guided by fires built on hilltops. Since elevating the fire would improve the visibility, placing the fire on a platform became a practice that led to the development of the lighthouse. In antiquity, the lighthouse functioned more as an entrance marker to ports than as a warning signal for reefs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheboygan River Front Range Light
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Cheboygan may refer to a location in the United States: *Cheboygan, Michigan, the city * Cheboygan County, Michigan * Cheboygan River *Cheboygan Point in Lake Huron near the city of Cheboygan * Cheboygan State Park near the city of Cheboygan See also *Sheboygan (other) Sheboygan may refer to: Places in Wisconsin * Sheboygan, Wisconsin, city * Sheboygan (town), Wisconsin, town * Sheboygan County, Wisconsin, county * Sheboygan Falls, Wisconsin, city * Sheboygan Falls (town), Wisconsin, town * Sheboygan River ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Services Administration
The General Services Administration (GSA) is an independent agency of the United States government established in 1949 to help manage and support the basic functioning of federal agencies. GSA supplies products and communications for U.S. government offices, provides transportation and office space to federal employees, and develops government-wide cost-minimizing policies and other management tasks. GSA employs about 12,000 federal workers. It has an annual operating budget of roughly $33 billion and oversees $66 billion of procurement annually. It contributes to the management of about $500 billion in U.S. federal property, divided chiefly among 8,700 owned and leased buildings and a 215,000 vehicle motor pool. Among the real estate assets it manages are the Ronald Reagan Building and International Trade Center in Washington, D.C., which is the largest U.S. federal building after the Pentagon. GSA's business lines include the Federal Acquisition Service (FAS) and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boatnerd
The boatnerd corporation, a registered not for profit corporation, circulates information about vessels that ply the North American Great Lakes. When Acheson Ventures provided space for a headquarters for the organization in their Maritime Center overlooking the St Clair River, they called boatnerd ''"the most widely-used website for Great Lakes maritime information."'' Reporters consider the boatnerd site reliable enough that they cite or quote it by name in their articles. The organization was profiled by ''The Globe and Mail'' in 2008. 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 gets over 20 million page views a month. According to ''The Globe and Mail'' the site's voluntee ... [...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] |
Radar
Radar is a detection system that uses radio waves to determine the distance (''ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the objects and return to the receiver, giving information about the objects' locations and speeds. Radar was developed secretly for military use by several countries in the period before and during World War II. A key development was the cavity magnetron in the United Kingdom, which allowed the creation of relatively small systems with sub-meter resolution. Th ... [...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 sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Lighthouse Service
The United States Lighthouse Service, also known as the Bureau of Lighthouses, was the agency of the United States Government and the general lighthouse authority for the United States from the time of its creation in 1910 as the successor of the United States Lighthouse Board until 1939 when it was merged into the United States Coast Guard. It was responsible for the upkeep and maintenance of all lighthouses and lightvessels in the United States. History 1789–1910 In 1789, the United States Lighthouse Establishment (USLHE) was created and operated under the Department of the Treasury. All U.S. lighthouse ownership was transferred to the government which became the general lighthouse authority (GLA). In 1792, the Cape Henry Lighthouse was the first lighthouse built by the USLHE. In 1822, French physicist, Augustin Fresnel designed the Fresnel lens. In 1841 the Fresnel lens was first used in the United States and installed on the Navesink Lighthouse. In 1852 the Lighthouse Bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
