Buoy
For the commune, to see Buoy (Loire-Atlantique) ----- The buoy is a float, often hollow and generally inflated air or of a neutral gas, or filled with a solid matter lighter than water such as the hydrophobic foam of Polystyrène in order to prevent the container filling of water or from deflating, thus losing its effectiveness in the event of puncture or of escape after a shock.
The floating is obtained according to the principle of the Poussée of Archimedes, because its Masse is lower than that of its equivalent volume out of water.
There exist several types of buoys according to use:
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It can be a floating device, generally in the shape of ring or inflated roll, for the Sécurité at sea; according to its size, it can make it possible to help to maintain the weight of a person completely with flood, and to avoid the drowning, or to help it to be maintained with flood and to limit the tiredness of the stroke. (Buoy crowns)
- It can be also used to maintain a material out of water.
- It can also be a indication at sea, on a river, a lake or a basin, in order to mark a course or Chenal obligatory, dangerous or prohibited with navigation for certain categories of vehicles or the stroke, and it can also indicate the side of skirting of an obstacle for the boats and boats sporting. According to the place where it is used, its colors and dimensions vary according to a standardized code.
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