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yellow
Yellow represents caution on these buoys. Usually meaning to stay away from them. They are used to indicate pipes, dredge lines, traffic schemes, an isolated danger.
Danger
G. D. Hamilton has written: 'Guide to Moored Buoys and Other Ocean Data Acquisition Systems' -- subject(s): Oceanographic buoys, Meteorological instruments
Jerry Chalmers McCall has written: 'Data flow and applications of United States deep-ocean moored and drifting data buoys' -- subject(s): Oceanographic buoys
Yellow represents caution on these buoys. Usually meaning to stay away from them. They are used to indicate pipes, dredge lines, traffic schemes, an isolated danger. They do not usually indicate which side to leave them on
Marshall A. Paige has written: 'A Surface recovery technique for deep moored vertical arrays' -- subject(s): Oceanographic buoys
I think "buoys" is the word you're looking for? Definition from Merriam Webster's Online Dictionary: "A floating object moored to the bottom to mark a channel or something (as a shoal) lying under the water."
The ship was moored in a moonlit bay. Be assured, she's moored!
C. Godfrey Day has written: 'Wind measurement from moored buoys' 'Oceanographic observations, 1959, east coast of the United States' -- subject(s): Ocean temperature, Oceanography, Salinity
Buoys are generally used for the navigation of vessels. Their distinctive shape, colour and light (if they have one) will indicate to the navigator, where abouts a danger lies. Marking either the edge of a shallow channel or an isolated danger.In combination with an updated chart, they can be used for determining a position. Generally used in shallow water (they are anchored to the bottom), they prevent vessels running aground.There are some buoys that gather ocean data (floating free) and others specifically designed to moor vessels.
Some red buoys are known as "nun" buoys.(Ref: SB-4)some red buoys are known as nun buoys