Sea Mark
Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! A sea mark, also seamark and navigation mark, is a pilotage aid which identifies the approximate position of a maritime channel, hazard and administrative area to allow boats, ships and seaplanes to navigate safely. There are three types of sea mark:beacons - fixed to the seabed, buoys - consisting of a floating object that is usually anchored to a specific location on the bottom of the sea or to a submerged object. A type of cairn built on a submerged rock/object, especially in calmer waters. Sea marks are used to indicate channels, dangerous rocks or shoals, mooring positions, areas of speed limits, traffic separation schemes, submerged shipwrecks, and for a variety of other navigational...
ISBN: 978-6-1304-4962-9
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Книга по требованию
Дата выхода: июль 2011