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Daymarks
A daymark is a navigational aid for sailors and maritime pilot, pilots, distinctively marked to maximize its visibility in daylight. The word is also used in a more specific, technical sense to refer to a signboard or daytime identifier that is attached to a day beacon or other aid to navigation. In that sense, a daymark conveys to the mariner during daylight hours the same significance as the aid's light or reflector does at night. Standard signboard shapes are square, triangular, and rectangular, while the standard colours are red, green, orange, yellow, and black. Notable daymarks * Trinity House Obelisk, UK * Kingswear Daymark, UK * Tasku beacon tower, Finland * Keskiniemi beacon tower, Finland * Hiidenniemi beacon tower, Finland * Laitakari beacon tower, Finland * Herring Tower, Langness, Isle of Man * Le Hocq, Jersey * La Tour Cârrée, Jersey * Scharhörnbake, Germany Symbols used on US charts Chart symbols used by the US National Oceanic and Atmospheric Administrati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laitakari Beacon Tower
Laitakari beacon tower is a daymark (navigational aid) located on the island of Laitakari in the Gulf of Bothnia in Finland. The island is located east-northeast of Hailuoto and is within the municipal boundaries of the Oulu, City of Oulu. There has been a navigational aid on the island since the 1750s, and a beacon tower has been marked on a chart dated in 1785. The current Laitakari beacon tower was built in 1851. The top of the tower is built of wooden boards and painted red. The top structure is resting on top of supporting wooden beams wedged into the gravel. The structure survived the Crimean War, and is still being used as a navigational aid. When aligned with the bell tower of Oulu Cathedral, it guides small vessels to the fairway leading past the northern coastline of Hailuoto island. The tower is high from sea level and from the ground. Sources * {{coord, 65, 03, 09, N, 025, 09, 28, E, type:landmark_region:FI-14, display=title Towers completed in 1851 Buildin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Tour Cârrée
La Tour Cârrée, or The Square Tower, on Jersey, is not a tower but rather is a fortified guardhouse and magazine in the style of a blockhouse with loopholes for musketry. It may have been erected in 1778 on the site of a redoubt. The tower supported a battery of three 24-pounder cannons that stood on a paved surface in front of it. Shingle now covers this surface. The tower and battery played a role in the repelling in 1779 of the Charles Christian, Prince of Nassau-Weilburg, Prince of Nassau's attempt to land a force at the Franco-Dutch Invasion of Jersey. Historically, the structure and redoubts near it have been known as Square Fort, North Battery, and New North Battery. It is located on St Ouen's Bay, by St Ouen's Pond. Today the structure is painted white and black on the seaward side to serve as a daymark for sailors. Since 2007 the tower has been available as self-catering accommodation under a program the Jersey Heritage, Jersey Heritage Trust administers for the States o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hiidenniemi Beacon Tower
Hiidenniemi beacon tower () was a historic daymark tower on the northern coast of Hailuoto island in Gulf of Bothnia in Finland. The structure was located at the northernmost point of the island, a minor promontory named Hiidenniemi. The structure was built in 1859 from the plans drawn by Ernst Lohrmann. It was a wooden hexagonal (six-sided) tower. The tower had a topmarker, which was either a weather vane or a simple flag A flag is a piece of textile, fabric (most often rectangular) with distinctive colours and design. It is used as a symbol, a signalling device, or for decoration. The term ''flag'' is also used to refer to the graphic design employed, and fla .... The structure was later destroyed by fire and never rebuilt. Sources * {{Coord missing, Finland Towers completed in 1859 Towers in Finland Gulf of Bothnia Hailuoto Beacon towers Landmarks in Finland Buildings and structures in North Ostrobothnia Daymarks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keskiniemi Beacon Tower
The Keskiniemi beacon tower (''Keskiniemen tunnusmajakka'' in Finnish), often referred to as the Karvo beacon tower, is a historic daymark located on a promontory of Keskiniemi in the northwestern part of Hailuoto island in the Gulf of Bothnia in Finland Finland, officially the Republic of Finland, is a Nordic country in Northern Europe. It borders Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bothnia to the west and the Gulf of Finland to the south, .... The tower was built in 1858 to alert the vessels about sandbars reaching northwest from the site. It is the oldest surviving navigational aid on Hailuoto island. The tower has structural similarities with the Härkmeri beacon tower built in 1857. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tasku Beacon Tower
Tasku beacon tower (''Taskun pooki'' in Finnish) is a daymark tower located on the island of Tasku (''Pocket'' in English) in the Raahe archipelago in the Gulf of Bothnia in Finland. The structure was built in 1853 from the plans drawn by Albin Stjerncreutz. In 1983 the Finnish Maritime Administration handed it over to the City of Raahe. Currently the city is responsible of the upkeep of this historical aid to navigation. The Tasku beacon tower is one of three historical beacon towers in Raahe archipelago, however only two beacon towers remain: the second one is the Iso-Kraaseli beacon tower. The tower is made of wood and supported by a wooden central column measuring 1.5 meters (5 feet) around. The tower consists of a square bottom section, followed by a pyramidical top section. The top marker is a wooden cross, rising 19.2 meters (63 feet) above sea level. The tower is painted yellow. The beacon tower has historical cultural heritage and is a part of Finnish maritime building ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kingswear Daymark
Kingswear Daymark (also known as The Tower) is a 24 m (80 ft) octagonal limestone day beacon built in 1864, in an arable field above Froward Point near the town of Kingswear, Devon, England. Description The daymark was constructed of local limestone and slate in an arable field. It is octagonal and sharply battered with a truncated open top, and has a tall narrow pointed head arch on each side, forming eight stilted pillars. Construction In 1863, Charles Seale Hayne, owner of Brownstone at that time, became a founder member of the Dartmouth Harbour Commission whose main aim was to improve access and facilities to Dartmouth harbour. The following year, Seale Hayne leased land for the erection of this tower as a day beacon. See also *Landmark A landmark is a recognizable natural or artificial feature used for navigation, a feature that stands out from its near environment and is often visible from long distances. In modern-day use, the term can also be applied to smaller ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trinity House Obelisk
The Trinity House Obelisk, also known as the Trinity House Landmark, is a 19th-century obelisk located at Portland Bill, on the Isle of Portland, Dorset, England. Built as a daymark, it has been Grade II Listed since 1978. The obelisk was built in 1844 to warn ships off the coast of Portland Bill. It stands at the southern tip of the Isle of Portland, acting as a warning of the low shelf of rock extending 30 metres south into the sea. The obelisk is made of Portland stone Portland stone is a limestone geological formation (formally named the Portland Stone Formation) dating to the Tithonian age of the Late Jurassic that is quarried on the Isle of Portland in Dorset, England. The quarries are cut in beds of whi ... and is seven metres in height. It is inscribed "TH 1844" on its north face. The monument was saved from threatened demolition in 2002 after Trinity House deemed it too expensive to maintain. References {{Isle of Portland Isle of Portland Buildings and struc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Oceanic And Atmospheric Administration
The National Oceanic and Atmospheric Administration (NOAA ) is an American scientific and regulatory agency charged with Weather forecasting, forecasting weather, monitoring oceanic and atmospheric conditions, Hydrography, charting the seas, conducting deep-sea exploration, and managing fishing and protection of marine mammals and endangered species in the US exclusive economic zone. The agency is part of the United States Department of Commerce and is headquartered in Silver Spring, Maryland. History NOAA traces its history back to multiple agencies, some of which are among the earliest in the federal government: * United States Coast and Geodetic Survey, formed in 1807 * National Weather Service, Weather Bureau of the United States, formed in 1870 * United States Fish Commission, Bureau of Commercial Fisheries, formed in 1871 (research fleet only) * NOAA Commissioned Corps, Coast and Geodetic Survey Corps, formed in 1917 The most direct predecessor of NOAA was the Enviro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Square Or Rectangular Daymark - Paper Chart
In geometry, a square is a regular quadrilateral. It has four straight sides of equal length and four equal angles. Squares are special cases of rectangles, which have four equal angles, and of rhombuses, which have four equal sides. As with all rectangles, a square's angles are right angles (90 degrees, or /2 radians), making adjacent sides perpendicular. The area of a square is the side length multiplied by itself, and so in algebra, multiplying a number by itself is called squaring. Equal squares can tile the plane edge-to-edge in the square tiling. Square tilings are ubiquitous in tiled floors and walls, graph paper, image pixels, and game boards. Square shapes are also often seen in building floor plans, origami paper, food servings, in graphic design and heraldry, and in instant photos and fine art. The formula for the area of a square forms the basis of the calculation of area and motivates the search for methods for squaring the circle by compass and straightedge, now ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
