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Cattle Point Light
Cattle Point Lighthouse is a lighthouse on the southeastern tip of San Juan Island overlooking the Strait of Juan de Fuca where the Haro Straits meet the San Juan Channel, in San Juan County, Washington. The light lies adjacent to the state's Cattle Point Natural Resources Conservation Area and, since 2013, is part of the San Juan Islands National Monument. History The first light at Cattle Point was a lens lantern on a post erected in 1888. In 1921, the U.S. Navy installed a radio compass station. The modern , octagonal, concrete tower on Cattle Point was erected in 1935. Following automation in the late 1950s, the tower's lantern was removed and replaced with a 250-mm drum lens that sits on a short mast on top of the tower. The lighthouse received a temporary makeover in 1984, when it was used as a backdrop for an Exxon television commercial. The commercial's ahistorical additions were subsequently removed. The Coast Guard A coast guard or coastguard is a maritime secur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Juan Island, Washington
San Juan Island is the second-largest and most populous of the San Juan Islands in northwestern Washington, United States. It has a land area of 142.59 km2 (55.053 sq mi) and a population of 6,822 as of the 2000 census. Washington State Ferries serves Friday Harbor, which is San Juan Island's major population center, the San Juan County seat, and the only incorporated town in the islands. History The name "San Juan" originates from the 1791 expedition of Francisco de Eliza, who named the archipelago ''Isla y Archipiélago de San Juan'' to honor his patron sponsor, Juan Vicente de Güemes Padilla Horcasitas y Aguayo, 2nd Count of Revillagigedo. One of the officers under Eliza's command, Gonzalo López de Haro, was the first European to discover San Juan Island. During the Wilkes Expedition, American explorer Charles Wilkes renamed the island ''Rodgers Island''; the Spanish name remained on British nautical charts and over time became the island's official name. The i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 lens redu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouse
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 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Juan Island
San Juan Island is the second-largest and most populous of the San Juan Islands in northwestern Washington (state), Washington, United States. It has a land area of 142.59 km2 (55.053 sq mi) and a population of 6,822 as of the United States Census, 2000, 2000 census. Washington State Ferries serves Friday Harbor, Washington, Friday Harbor, which is San Juan Island's major population center, the San Juan County, Washington, San Juan County county seat, seat, and the only incorporation (municipal government), incorporated town in the islands. History The name "San Juan" originates from the 1791 expedition of Francisco de Eliza, who named the archipelago ''Isla y Archipiélago de San Juan'' to honor his patron sponsor, Juan Vicente de Güemes Padilla Horcasitas y Aguayo, 2nd Count of Revillagigedo. One of the officers under Eliza's command, Gonzalo López de Haro, was the first European to discover San Juan Island. During the Wilkes Expedition, American explorer Charles Wil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strait Of Juan De Fuca
The Strait of Juan de Fuca (officially named Juan de Fuca Strait in Canada) is a body of water about long that is the Salish Sea's outlet to the Pacific Ocean. The international boundary between Canada and the United States runs down the centre of the Strait. It was named in 1787 by the maritime fur trader Charles William Barkley, captain of ''Imperial Eagle'', for Juan de Fuca, the Greek navigator who sailed in a Spanish expedition in 1592 to seek the fabled Strait of Anián. Barkley was the first non-indigenous person to find the strait, unless Juan de Fuca's story was true. The strait was explored in detail between 1789 and 1791 by Manuel Quimper, José María Narváez, Juan Carrasco, Gonzalo López de Haro, and Francisco de Eliza. Definition The United States Geological Survey defines the Strait of Juan de Fuca as a channel. It extends east from the Pacific Ocean between Vancouver Island, British Columbia, and the Olympic Peninsula, Washington, to Haro Strait, San Juan Cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haro Strait
The Haro Strait is one of the main channels connecting the Strait of Georgia to the Strait of Juan de Fuca, separating Vancouver Island and the Gulf Islands in British Columbia, Canada from the San Juan Islands of Washington (state), Washington state in the United States. Haro Strait is a critical part of the route of the international boundary between Canada and the United States from the western terminus of the 49th parallel north, 49th parallel segment of that boundary, and was chosen by the arbitrator in the San Juan Islands dispute (Pig War (1859), Pig War) over the other main candidate, Rosario Strait, which lies on the east side of the San Juans. Definition According to the United States Geological Survey, USGS, Haro Strait's southern boundary with the Strait of Juan de Fuca is formed by a line between Discovery Island (British Columbia), Discovery Island, just east of Victoria, British Columbia, Victoria, to Cattle Point at the southern tip of San Juan Island. Haro Strait's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Juan County, Washington
San Juan County is a county located in the Salish Sea in the far northwestern corner of the U.S. state of Washington. As of the 2020 census, its population was 17,788. The county seat and only incorporated city is Friday Harbor, located on San Juan Island. The county was formed on October 31, 1873, from Whatcom County and is named for the San Juan Islands, which are in turn named for Juan Vicente de Güemes, 2nd Count of Revillagigedo, the Viceroy of New Spain. Although the islands themselves have no state highways, the ferry routes serving the islands are designated as part of the state highway system. History The San Juan Islands were the subject of a territorial dispute between Great Britain and the United States from 1846 to 1872, leading to the Pig War in 1859. The bloodless conflict ended through arbitration led by Kaiser Wilhelm I, which awarded the islands to the United States. San Juan County was home to Henry Cayou, one of the first elected officials of Native ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington (U
Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered on Washington, D.C. * George Washington (1732–1799), the first president of the United States Washington may also refer to: Places England * Washington, Tyne and Wear, a town in the City of Sunderland metropolitan borough ** Washington Old Hall, ancestral home of the family of George Washington * Washington, West Sussex, a village and civil parish Greenland * Cape Washington, Greenland * Washington Land Philippines *New Washington, Aklan, a municipality *Washington, a barangay in Catarman, Northern Samar *Washington, a barangay in Escalante, Negros Occidental *Washington, a barangay in San Jacinto, Masbate *Washington, a barangay in Surigao City United States * Washington, Wisconsin (other) * Fort Washington (disambiguati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Juan Islands National Monument
San Juan Islands National Monument is a U.S. National Monument located in the Salish Sea in the state of Washington. The monument protects archaeological sites of the Coast Salish peoples, lighthouses and relics of early European American settlers in the Pacific Northwest, and biodiversity of the island life in the region. The monument was created from existing federal land by President Barack Obama on March 25, 2013 under the Antiquities Act. Geography The national monument consists of approximately 75 separate sites totaling roughly in area. They are managed by the U.S. Bureau of Land Management as part of the National Landscape Conservation System National Conservation Lands, formally known as the National Landscape Conservation System, is a collection of lands in 873 federally recognized areas considered to be the crown jewels of the American West. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lens Lantern
A lens lantern is a small, self-contained lamp structure which may sometimes be used to serve as a lighthouse. Unlike a regular Fresnel lens, the lantern requires no housing to protect it from the weather; its glass sides would refract In physics, refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium. Refraction of light is the most commonly observed phenomeno ... and magnify the light in the same fashion as would the lens. Lens lanterns were popular alternatives to lighthouses in the nineteenth century; they required less care, were cheaper to erect, and could be fairly easily placed. References See also * F. Ross Holland, Jr. '' America's Lighthouses: Their Illustrated History Since 1716''. Lighthouse fixtures {{Pharology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coast Guard
A coast guard or coastguard is a maritime security organization of a particular country. The term embraces wide range of responsibilities in different countries, from being a heavily armed military force with customs and security duties to being a volunteer organization tasked with search and rescue without law enforcement authority. In most countries, a typical coast guard's functions are distinct from those of the navy (a military service) and the transit police (a law enforcement agency), while in certain countries has similarities to both. History The predecessor of the United Kingdom's modern His Majesty's Coastguard was established in 1809 as the Waterguard, a department of the HM Customs and Excise authority, which was originally devoted to the prevention of smuggling. At the time, due to high UK taxation on liquors such as brandy, and on tobacco etc., smuggling of such cargoes from places such as France, Belgium, and Holland was an attractive proposition for many; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bureau Of Land Management
The Bureau of Land Management (BLM) is an agency within the United States Department of the Interior responsible for administering federal lands. Headquartered in Washington DC, and with oversight over , it governs one eighth of the country's landmass. President Harry S. Truman created the BLM in 1946 by combining two existing agencies: the General Land Office and the Grazing Service. The agency manages the federal government's nearly of subsurface mineral estate located beneath federal, state and private lands severed from their surface rights by the Homestead Act of 1862. Most BLM public lands are located in these 12 western states: Alaska, Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington and Wyoming. The mission of the BLM is "to sustain the health, diversity, and productivity of the public lands for the use and enjoyment of present and future generations." Originally BLM holdings were described as "land nobody wanted" because home ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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