Buoy: Difference between revisions

A buoy (/ˈbɔɪ/, also /ˈbwɔɪ/ or US: /ˈbuːiː/) is a floating device that can have many purposes. It can be anchored (stationary) or allowed to drift with ocean currents. The word, of Old French or Middle Dutch origin, is (in British English) now most commonly pronounced /ˈbɔɪ/ (identical with boy, as in buoyant). In American English the pronunciation is closer to "boo-ee."

Types

• maritime channel, hazard and administrative area to allow boats and ships to navigate
  safely. Some navigational buoys are fitted with a bell or gong, which sounds when waves move the buoy
• Lifebuoy – used as a life saving buoy designed to be thrown to a person in the water to provide buoyancy. Usually has a connecting line allowing the casualty to be pulled to the rescuer
• Submarine communication buoys – used for release in case of emergencies or for communication
• DAN buoy – has several meanings:
  • A large maritime navigational aid providing a platform for light and radio beacons
  • A lifebuoy with flags used on yachts and smaller pleasure craft
  • A temporary marker buoy used during Danish seine fishing to mark the anchor position of a net.
  • A temporary marker buoy set by danlayers during minesweeping operations to indicate the boundaries of swept paths, swept areas, known hazards, and other locations or reference points.
  • A temporary marker buoy set to mark a man overboard position.
• Large Navigational Buoy (LNB or
  Lanby buoy) is an automatic buoy over 10m high equipped with a powerful light monitored electronically as a replacement for lightships.^[1] A LNB may be marked on charts as a "Superbuoy."^[2]
• Sonobuoy – used by anti-submarine warfare aircraft to detect submarines by SONAR
• Surface marker buoy – taken on dives by scuba divers to mark their position underwater^[3]
• decompression stops
• decompression stops
  on their ascent.
• Fairway Buoy
  – a navigational buoy which marks the entrance to a channel or a nearby landfall
• Emergency wreck buoy – An Emergency Wreck Buoys provides a clear and unambiguous means of marking new wrecks. This buoy is used as a temporary response, typically for the first 24–72 hours. This buoy is coloured in an equal number of blue and yellow vertical stripes and is fitted with an alternating blue and yellow flashing light. This has come about due to the collisions which occurred in the Dover Straits in 2002 when vessels struck the new wreck of the MV Tricolor.^[4]
• lateral marker buoy
• Mooring buoys – used to keep one end of a
  mooring cable or chain on the water's surface so that ships or boats can tie on to it. Many marinas
  mark these with a number and assign it to a particular vessel, or rent it out to transient vessels.
• Tripping buoys – used to keep one end of a 'tripping line' on the water's surface so that a stuck anchor can more easily be freed
• Ocean Data Acquisition Systems^[5] and may be marked on charts as "Superbuoys."^[2]
• tsunami warning systems in the Pacific Tsunami Warning Center
  and Indian Oceans.
• R/P FLIP
  .
• Profiling buoy – specialized models which adjust buoyancy so that they will sink at a controlled rate to 2,000 metres below the surface while measuring sea temperatures and salinity. After a time, typically 10 days, the buoy returns to the surface, transmits its data via satellite, and then sinks again.[6] See Argo (oceanography).
• Ice marking buoys – used for marking ice holes in frozen lakes and rivers, so that snowmobiles do not drive over the holes.
• Marker buoys – used in
  pyrotechnic to provide the flare and smoke
  . It is commonly a 3-inch (76 mm) diameter device about 20 inches (500 mm) long that is set off by contact with seawater and floats on the surface. Some markers extinguish after a set period and others are made to sink.
• Lobster trap buoys – brightly colored buoys used for the marking of lobster trap locations so the person lobster fishing can find their lobster traps. Each lobster fisherman has his or her own color markings or registration numbers so they know which ones are theirs. They are only allowed to haul their own traps and must display their buoy color or license number on their boat so law enforcement officials know what they should be hauling. The buoys are brightly colored with highly visible numbers so they can be seen under conditions when there is poor visibility like rain, fog, sea smoke, etc.^[7][8]
• Wave buoy – used to measure the movement of the water surface as a wave train. The wave train is analysed to determine statistics like the significant wave height and period, and wave direction.
• Target buoy – used to simulate target (like small boat) in live fire exercise by naval and coastal forces, usually targeted by weapons (medium size) like HMG's, rapid fire cannons (20 or so mm), autocannons (bigger ones up to 40 and 57mm) and also anti-tank rockets.
• Wreck buoy – a buoy to mark a wrecked ship to warn other ships to keep away because of unseen hazards.
• U.S. Coast Guard vessel or airframe for search and rescue. Since the SLDMB has a very small surface area above the ocean surface and a high underwater surface area, there is very little leeway in response to the direct forcing of winds and waves.^[10]
• The space buoy is a common element in science fiction that refers to a stationary object in outer space that provides navigation data or warnings about that particular area.
• Buoy racing is the most prevalent form of yacht racing

Other uses

• The word "buoyed" can also be used figuratively. For example, a person can buoy up ('lift up') someone's spirits by providing help and empathy.^[11]
• Buoys are used in some wave power systems to generate electrical power.^[12]
• Weber-Stephen Products Co., invented the kettle grill by cutting a metal buoy in half and fashioning a dome shaped grill with a rounded lid.^[13]

• 
  Several different buoys at a storage depot.
• 
  A buoy used as turn marker for sailing races.
• 
  Old iron buoys, most likely for mooring.
• 
  Children playing on a buoy in the Volga
• 
  A buoy beached at Sebastian Inlet State Park.
• 
  Emergency buoy of the Swedish submarine Nordkaparen
• 
  Gas buoy stranded on land after 1915 Galveston Hurricane, near Texas City, Texas
• 
  Starboard lateral Buoy (Lateral Mark - System B - IALA ) as Channel Marker Buoy at "Río de la Plata" river, Buenos Aires, Argentina
• 
  Envirtech Tsunami Buoy MKIII before deployment in Andaman Sea
• 
  Lobster buoys hanging on a tree, Sprucehead Island, Maine, USA
• 
  Buoys in dry storage, Homer, Alaska
• 
  Drifting Buoy fitted with a Barometer (DBi)

See also

Wikimedia Commons has media related to Buoys.

Wikisource has the text of the 1911 Encyclopædia Britannica article "Buoy".

• American Practical Navigator
• Buoy anti-tank obstacle
• Buoyancy
• Day beacon
• International Arctic Buoy Program
• Lateral mark
• Light List
• Lighthouse
• Lightvessel
• List of lights
• PowerBuoy
• United States Coast Pilot

References

External links

Look up buoy in Wiktionary, the free dictionary.

• Global Buoy Network Maps
• Lighthouses and Buoys
• North American Buoy Map
• iQuam – Quality monitoring for buoy measurements
• The Italian Data Buoy Network
• Thailand Tsunami Buoys
• Buoy Health