A buoy is a floating device that can have many uses. It is usually anchored in a certain place. The word is most commonly said ([bɔɪ]) (as in buoyant), but in American English it is often pronounced [ˈbu.i].
Buoys are used by ships to navigate or sail safely from place to place. They are used to mark a safe channel on a river, lake or harbour. They are used to mark dangerous rocks and other items which ships have to keep clear of. They can also be used to mark a shipwreck, pipelines or swimming areas.
- http://www.iala-aism.org/web/pages/publications/docpdf/mbsenpdf/MBS1to3.pdf Maritime Buoyage System Archived 2006-10-08 at the Wayback Machine
- Davies, D (1998). "Diver location devices". Journal of the South Pacific Underwater Medicine Society. 28 (3). Archived from the original on 2009-05-19. Retrieved 2013-04-16.
- IALA (2008). "International Dictionary of Marine Aids to Navigation – ODAS buoy". Retrieved 10 December 2016.