a floating object that is anchored to the seabed or attached to another object. It is used as a navigational aid, surface marker, or an a loading point for cargoes (see Single Point Mooring Buoy).

Floating platforms that hold instruments for measuring conditions in the ocean and atmosphere such as currents, water temperature, wind, and atmospheric pressure. Often they relay information to satel [..]

 Floats that warn of hazards such as rocks or shallow ground, to help ships maneuver through unfamiliar harbors.

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