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一、概述: 近数十年来,随着航运事业的发展,船舶逐渐增大,并要求在各种气候条件下都能航行,但有些海岸线的形状和海底构造,对船舶航行特别危险,故需要在海洋中或沿岸地带建造灯塔,用以引导船舶驶向附近的港口。灯塔也可用以指示礁石、浅滩和沙州以及其它危及航行的障碍物。由于地球表面为一曲面,故塔身必须具有充分的高度,并在顶部装设灯光设备,塔身做成白色或红色和白色、黑色和白色的组合,以便使远距离的船舶容易察见(一般要求能见度为20海里)有的灯塔还装有雾警讯号,设有各种
I. Overview: In recent decades, with the development of shipping business, ships have been gradually increasing in size and require navigation under various climatic conditions. However, the shape and seabed structure of some coastlines are particularly dangerous for the navigation of ships and therefore require Build lighthouses in the ocean or along the coast to guide ships toward nearby ports. The lighthouse can also be used to indicate reefs, shoals and sand flats and other obstructions that jeopardize navigation. Because the surface of the Earth is a surface, the tower must be of sufficient height with light fittings at the top and the tower to be white or a combination of red and white, black and white, to make it easy to see ships on long distances General requirements visibility of 20 nm) Some lighthouses are also equipped with fog signal, with a variety