Flashing Light is a rhythmic light in which the total duration of the light in each period is clearly shorter than the total duration of the darkness and in which the flashes of light are all of equal duration. (Commonly used for a single-flashing light which exhibits only single flashes which are repeated at regular intervals.). It is normally used in light signals in Lighthouses and lighted buoys. Different lighthouses have different frequencies and not all are flashing and mariners can find out which light house they are near by the characteristic of the light signal. A light characteristic is a coded description displayed on a nautical chart under the chart symbol for a lighthouse, lightvessel or sea mark with a light on it, to indicate how that light is recognised visually and audibally. ... The Peggys Point lighthouse in Nova Scotia, Canada An aid for navigation and pilotage at sea, a lighthouse is a tower building or framework sending out light from a system of lamps and lenses or, in older times, from a fire. ... A sea lion on navigational buoy #14 in San Diego Harbor A buoy is a floating device that can have various purposes, which determine whether the buoy is anchored (stationary) or allowed to drift: The word is derived from the Dutch boei. In North American English it is pronounced as...
Other types of rhythmic lights used by lighted aids to navigation is isophase light and occulting light.
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