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An example of a complete light characteristic is "Gp Oc(3) W 10s 15m 10M". This indicates that the light is a group occulting light in which a group of three eclipses repeat every 10 seconds; the light is white; the light is 15 metres above the chart datum and the nominal range is 10 nautical miles.
A list of lights is a publication describing lighthouses and other aids to maritime navigation. Most such lists are published by national hydrographic offices . Some nations, including the United Kingdom and the United States , publish lists that cover the whole world in many volumes.
Wave-washed lighthouses are masonry structures constructed to withstand water impact, such as Eddystone Lighthouse in Britain and the St. George Reef Light of California. In shallower bays, Screw-pile lighthouse ironwork structures are screwed into the seabed and a low wooden structure is placed above the open framework, such as Thomas Point ...
In August 2011, the Frying Pan Tower was directly hit [6] [circular reference] by Hurricane Irene with measured winds of 67 mph (108 km/h) and waves of 28 ft (8.5 m). An observational flight the day after the storm, August 28, 2011, showed that the tower had no visible damage from the impact. [ 7 ]
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 ...
Milwaukee Breakwater Light ; Location: Milwaukee, Wisconsin: Coordinates: 1]: Tower; Constructed: 1926: Foundation: Concrete: Construction: 1 ⁄ 4 inch (6.4 mm) steel plate, steel frame, cast iron lantern: Automated: 1966 [2]: Height: 53 feet (16 m) [3]: Shape: Square on square house, topped by round lantern: Markings: white with black lantern & parapet: Heritage: National Register of ...