buoy


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buoy

(boi, bo͞o`ē), float anchored in navigable waters to mark channels and indicate dangers to navigation (isolated rocks, mine fields, cables, and the like). The shape, color, number, and marking of the buoy are all significant, but unfortunately there are two competing systems of color coding which have been adopted in different parts of the world. The International Association of Lighthouse Authorities (IALA) adopted a system in 1977 which uses red for the left–hand side of a channel returning from the sea and green for the right side. Because the American rule has always been "red to the right returning," the IALA accepted a second system in 1983 which would keep the traditional color–coding for U.S. waters. Both systems use yellow to indicate special zones, such as fishing areas, anchorages, dredging operations, etc. Although the spar buoys (upright posts) used in northern latitudes are usually wooden, large buoys are generally made of steel or iron. Nun buoys have conical tops; can buoys have flat tops. Buoys may be fitted with bells or whistles (usually operated by motion of the waves), and battery-powered light buoys are commonly used; radio buoys came into use in 1939. There are also mooring buoys, used for the anchoring of ships.

buoy

[bȯi]
(engineering)
An anchored or moored floating object, other than a lightship, intended as an aid to navigation, to attach or suspend measuring instruments, or to mark the position of something beneath the water.

buoy

a distinctively shaped and coloured float, anchored to the bottom, for designating moorings, navigable channels, or obstructions in a body of water
References in periodicals archive ?
He suggested that deep-sea buoys should be put in the vicinity of the Sumatra Fault where most of the earthquakes have been triggered.
He'll cast the bait past the buoy and drag it back towards himself.
A random drawing from entries will take place in October 2013, and the winner of the Buoy stool will be announced through Mayhew's social media, website and press channels.
The company even hopes to calm the fears of Oregon Coast fishermen and crabbers, who worry about the buoys disrupting fishing grounds.
When the submarine is far enough away, the buoy ascends to the surface, deploys floatation devices and sends a message to a command and control center through an Iridium satellite.
Norwegian floating production, storage and offloading (FPSO) contractor BW Offshore ASA (OSE: BWO) said on Thursday (19 June) that its subsidiary, APL Offshore Pte Ltd, has received a buoy system installation order from SUEZ Energy North America.
The generator, initially deployed on a navigation buoy for ports and harbors, is capable of generating 20 joules of energy per stroke, which corresponds to an average output power of more than 5 watts under typical ocean wave conditions.
A buoy snapped loose after it began to pitch at the same frequency as storm waves, loading the buoy's mooring line with 7,000 pounds of pressure every 15 seconds.
The buoy bore the name Heather Jane II and was probably a mooring buoy which got loose.
The Gulf of Maine Ocean Observing System (GoMOOS) collects and tracks data on wind conditions, fog, air and water temperature at various depths, visibility, waves, salinity, chlorophyll concentration, and other environmental factors from ten buoy locations throughout the Gulf.
Hartlepool Council is now appealing for information after thieves stole the bell buoy feature from the town's Central Estate.
The tripletail has a unique way of camouflaging itself, by nosing into the buoy or line of the buoy that leads to the actual trap, getting as close to it as possible and lying nearly flat on one of its sides.