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La Isleta Lighthouse
La Isleta Lighthouse () is an active 19th century lighthouse on the Spanish island of Gran Canaria in the Canary islands. The lighthouse has been constructed on the rocky peninsula of La Isleta, which overlooks the Port of Las Palmas to the north of the city of Las Palmas, the capital of Gran Canaria. Situated at the north-eastern tip of the island, the La Isleta light marks the approaches to the port and lies midway between the Sardina lighthouse to the east and the Punta de Melenara lighthouse of Telde to the south. Description La Isleta was one of the first lighthouse to be completed as part of the original maritime lighting plan for the Canaries, and is the oldest lighthouse in Gran Canaria. Designed by the engineer by Juan de León y Castillo, it became operational in 1865 and consists of a two-storey white washed building. The light is displayed from a lantern room at the top of a masonry tower, above the building. The hilltop location of the lighthouse means that it ...
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Las Palmas
Las Palmas (, ; ), officially Las Palmas de Gran Canaria, is a Spain, Spanish city and capital of Gran Canaria, in the Canary Islands, on the Atlantic Ocean. It is the capital (jointly with Santa Cruz de Tenerife), the most populous city in the Autonomous communities of Spain, autonomous community of the Canary Islands, and the List of municipalities of Spain, ninth-largest city in Spain with a population of 381,223 in 2020. It is also the fifth-most populous urban area in Spain and (depending on sources) List of metropolitan areas in Spain, ninth- or tenth-most populous metropolitan area in Spain. Las Palmas is located in the northeastern part of the island of Gran Canaria, about off the Moroccan coast in the Atlantic Ocean. Las Palmas experiences a hot desert climate,ThWorld map of Koppen-Geiger climate classification/ref> offset by the local cooler Canary Current, with warm temperatures throughout the year. It has an average annual temperature of . The city was founded in ...
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Barbier, Benard, Et Turenne
Barbier, Benard, et Turenne (BBT) was a French company founded in 1862, specializing in the manufacture of spotlights, Fresnel lenses for lighthouses, and lighting systems. It was the world's leading producer of lighthouse beacons from the end of the 19th century onwards. It dissolved in 1982. History The company was founded in 1862 by Frederic Barbier and Stanislas Fenestre as Barbier and Fenestre. It was renamed Barbier et Cie in 1887 and Barbier and Bénard in 1889. It became Barbier, Benard, et Turenne early in the 20th century, and became a public limited company in 1919.École des Ponts ParisTech, enpc.fr website,/web-BBT.pdf "Barbier Benard Turenne (BBT), historical note"Thobie, Jacques. '' Administration General beacons of the Ottoman Empire and the Collas and Michel society, 1860-1960 '' (L'Harmattan, 2004), p. 12. Production Lighthouses Barbier, Benard, et Turenne began with a specialty in the production of equipment for lighthouse beacons, such as Fresnel lenses ...
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List Of Lighthouses In Spain
This is a list of lighthouses in Spain. Lighthouses By autonomous communities * List of lighthouses in the Balearic Islands This is a list of lighthouses in the Balearic Islands. The Spain, Spanish archipelago lies at the western end of the Mediterranean Sea. Lighthouses See also * List of lighthouses in Spain * List of lighthouses in the Canary Islands Refe ... * List of lighthouses in the Canary Islands See also * Lists of lighthouses and lightvessels * List of tallest lighthouses References External links {{Architecture of Spain ...
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List Of Lighthouses In The Canary Islands
This is a list of lighthouses in the Canary Islands. The Spanish archipelago lies to the west of Africa, in the Atlantic Ocean. Lighthouses Map See also * List of lighthouses in Spain * List of lighthouses in the Balearic Islands This is a list of lighthouses in the Balearic Islands. The Spain, Spanish archipelago lies at the western end of the Mediterranean Sea. Lighthouses See also * List of lighthouses in Spain * List of lighthouses in the Canary Islands Refe ... References External links * {{DEFAULTSORT:Canary Islands * Lists of lighthouses in Spain Lighthouses ...
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National Geospatial-Intelligence Agency
The National Geospatial-Intelligence Agency (NGA) is a combat support agency within the United States Department of Defense whose primary mission is collecting, analyzing, and distributing geospatial intelligence (GEOINT) in support of national security. Initially known as the National Imagery and Mapping Agency (NIMA) from 1996 to 2003, it is a member of the United States Intelligence Community. NGA headquarters, also known as NGA Campus East or NCE, is located at Fort Belvoir North Area in Springfield, Virginia. The agency also operates major facilities in the St. Louis, Missouri area (referred to as NGA Campus West or NCW), as well as support and liaison offices worldwide. The NGA headquarters, at , is the third-largest government building in the Washington metropolitan area after The Pentagon and the Ronald Reagan Building. In addition to using GEOINT for U.S. military and intelligence efforts, NGA provides assistance during natural and man-made disasters, aids in se ...
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Port Authority
In Canada and the United States, a port authority (less commonly a port district) is a governmental or quasi-governmental public authority for a special-purpose district usually formed by a legislative body (or bodies) to operate ports and other transportation infrastructure. In Canada, the federal Minister of Transport selects the local chief executive board member and the rest of the board is appointed at the recommendation of port users to the federal Minister; while all Canadian port authorities have a federal or Crown charter called ''Letters Patent''. Numerous Caribbean nations have port authorities, including those of Aruba, British Virgin Islands, Bahamas, Jamaica, Cayman Islands, Trinidad and Tobago, St. Lucia, St. Maarten, St. Vincent and the Grenadines. Central and South America also have port agencies such as ''autoridad'' and ''consorcio'' (authority and consortium). In Mexico, the federal government created sixteen port administrations in 1994–1995 called ''Adm ...
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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 st ...
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Aerobeacon
An aerobeacon is a light assembly used to create a fixed or flashing signal visible over long distances. It consists of a high intensity electric lamp mounted with a focusing device in a cylindrical housing, which usually is rotated on a vertical axis by an electric motor. The sweep of the narrow beam thus produced gives the flashing effect. Aerobeacons were originally developed for aviation use, mostly as aerodrome beacons, but they also saw extensive use in lighthouses. They were far less expensive to manufacture and maintain than classic glass Fresnel lenses, and much more durable; they could be mounted and exposed to the weather. Historic models include the DCB-24, which used a single parabolic reflector; the DCB-224, a double-beamed version of the DCB-24; and the DCB-36, which used a system of plastic Fresnel type lenses. Manufacturers included Carlisle & Finch in Cincinnati and the Crouse-Hinds Company in Syracuse, New York. Aerobeacons have replaced fragile glass Fresnel l ...
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Fresnel Lens
A Fresnel lens ( ; ; or ) is a type of composite compact lens developed by the French physicist Augustin-Jean Fresnel (1788–1827) for use in lighthouses. It has been called "the invention that saved a million ships." The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. The simpler dioptric (purely refractive) form of the lens was first proposed by Count Buffon and independently reinvented by Fresnel. The '' catadioptric'' form of the lens, entirely invented by Fresnel, has outer elements that use total internal reflection as well as refraction; it can capture more oblique light from a light source and add it to the beam of a lighthouse, making the light visible from greater distances. Description The Fresnel len ...
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Light Characteristic
A light characteristic is all of the properties that make a particular navigational light identifiable. Graphical and textual descriptions of navigational light sequences and colours are displayed on nautical charts and in Light Lists with the chart symbol for a lighthouse, lightvessel, buoy or sea mark with a light on it. Different lights use different colours, frequencies and light patterns, so mariners can identify which light they are seeing. Abbreviations While light characteristics can be described in prose, e.g. "Flashing white every three seconds", lists of lights and navigation chart annotations use abbreviations. The abbreviation notation is slightly different from one light list to another, with dots added or removed, but it usually follows a pattern similar to the following (see the chart to the right for examples). * An abbreviation of the type of light, e.g. "Fl." for flashing, "F." for fixed. * The color of the light, e.g. "W" for white, "G" for green, "R" for re ...
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Gran Canaria
Gran Canaria (, ; ), also Grand Canary Island, is the third-largest and second-most-populous island of the Canary Islands, an archipelago off the Atlantic coast of Northwest Africa which is part of Spain. the island had a population of that constitutes approximately 40% of the population of the archipelago. Las Palmas de Gran Canaria, the capital of the island, is the biggest city of the Canary Islands and the ninth of Spain. Gran Canaria is located in the Atlantic Ocean in a region known as Macaronesia about off the northwestern coast of Africa and about from Europe. With an area of km2 ( sq. mi) and an altitude of at Morro de la Agujereada, Gran Canaria is the third largest island of the archipelago in both area and altitude. Gran Canaria is also the third most populated island in Spain. History In antiquity, Gran Canaria was populated by the North African Canarii, who may have arrived as early as 500 BC. In the medieval period, after over a century of European incur ...
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La Isleta Lighthouse General View-Las Palmas De Gran Canaria
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