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 ?
It doesn't take long for growth and debris to attach to the buoys and in turn, a mini ecosystem of bait is attracted to them.
The group, led by a young male, are seen taking the life buoy out of its casing and throwing it into the water.
The official said that the light buoys previously installed on the Narva River will remain there.
The buoys are part of a multimillion-dollar warning system that includes seabed detection devices and sirens.
Lopez admitted that they received the information about the steel marker and the buoys last May, but upon verification, these turned out to be false.
Our contractor is now working in line with Trinity House guidelines to recover and reinstate the buoy to its original moorings.
The buoy was originally built around 1920 to prevent ships from hitting mid-sea sand.
The targeted applications for this technology include recharging stations for UUV (Unmanned Underwater Vehicles), elimination of batteries, replacement/augmentation for solar power, sonar listening stations, weather monitoring buoys, wave monitoring buoys, Tsunami warning stations, and port monitoring.
Dutch energy company Eneco has bought Fugro's wind Lidar buoy and a Japanese company is to deploy a buoy close to a floating power generation system.
Several buoys have been fitted with NORTEK AWAC's for the collection of current & tidal data.
Listen for the pneumatic sound of air pushing the buoy out the launcher.
An American manufacturer says the Japan Meteorological Agency in Tokyo has ordered six tsunami-sensing buoy systems, which will be deployed in the northwest Pacific approximately 200 nautical miles east of Sendai, Japan.