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Leading lights, also known as range lights in the United States, are a pair of light beacons used in navigation [2] to indicate a safe passage for vessels entering a shallow or dangerous channel; they may also be used for position fixing. At night, the lights are a form of leading line that can be used for safe navigation. The beacons consist ...
The North Manitou Shoal Light, also known as the North Manitou Light or, locally, The Crib, is a lighthouse located in Lake Michigan, southeast of North Manitou Island in Leland Township, Michigan. When it was automated in 1980, it was the last manned offshore light in the Great Lakes . [ 3 ]
Royal Sovereign lighthouse was a lighthouse marking the Royal Sovereign shoal, a sandbank 11 km (6.8 mi) offshore from Eastbourne.The structure's distinctive shape was easily recognised as the lighthouse tower is perched above a large platform (which functions as a helicopter deck) supported by a single pillar rising out of the water. [3]
Buzzard's Bay Entrance Light in Buzzards Bay, Massachusetts, a Texas Tower. A Texas Tower lighthouse is a structure which is similar to an off-shore oil platform. Seven of these structures were built in the 1960s off the shores of the United States. Automation started in the late 1970s, which led to the obsolescence of the housing built for the ...
Gravelly Shoals Light is an automated lighthouse that is an active aid to navigation on the shallow shoals extending southeast from Point Lookout [7] on the western side of Saginaw Bay. The light is situated about 2.7 miles (4.3 km) offshore and was built to help guide boats through the deeper water between the southeast end of Gravelly Shoals ...
The offshore location posed a challenge and work was only possible during low tide when the sandbank was exposed. [ 2 ] In order to optimize the safety, the lighthouse saw further upgrades between 1960 and 1961 with the installation of a radar system, directional radio antennas and a new casing for the light.
A Morse code light is light in which appearances of light of two clearly different durations (dots and dashes) are grouped to represent a character or characters in the Morse Code. For example, "Mo(A)" is a light in which in each period light is shown for a short period (dot) followed by a long period (dash), the Morse Code for "A".
Chesapeake Light is an offshore lighthouse marking the entrance to the Chesapeake Bay. [1] The structure was first marked with a lightship in the 1930s, and was later replaced by a "Texas Tower" in 1965. The lighthouse was eventually automated and was used for supporting atmospheric measurement sites for NASA and NOAA. Due to deteriorating ...
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