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Lighthouse: Navigation, History of lighthouses, Leading lights, Fresnel lens, Lens lantern, Day beacon, Flannan Isles, Dover Castle, Lighthouse of Alexandria, List of lighthouses and lightvessels - Softcover

 
9786130212018: Lighthouse: Navigation, History of lighthouses, Leading lights, Fresnel lens, Lens lantern, Day beacon, Flannan Isles, Dover Castle, Lighthouse of Alexandria, List of lighthouses and lightvessels

Inhaltsangabe

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A lighthouse is a tower, building, or framework designed to emit light from a system of lamps and lenses or, in older times, from a fire and used as an aid to navigation and to pilots at sea. Lighthouses are used to mark dangerous coastlines, hazardous shoals and reefs, and safe entries to harbors and can also assist in aerial navigation. Once widely used, the number of operational lighthouses has declined due to the expense of maintenance and replacement by modern electronic navigational aids.

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Reseña del editor

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A lighthouse is a tower, building, or framework designed to emit light from a system of lamps and lenses or, in older times, from a fire and used as an aid to navigation and to pilots at sea. Lighthouses are used to mark dangerous coastlines, hazardous shoals and reefs, and safe entries to harbors and can also assist in aerial navigation. Once widely used, the number of operational lighthouses has declined due to the expense of maintenance and replacement by modern electronic navigational aids.

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