What is the meaning of whistle buoy?

noun

WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). whistle buoy. Retrieved September 29, 2026, from http://smartdefine.org/whistle_buoy/definitions/1323823
ChicagoWordNet. 2010. "whistle buoy" http://smartdefine.org/whistle_buoy/definitions/1323823 (accessed September 29, 2026).
HarvardWordNet 2010, whistle buoy, Smart Define, viewed 29 September, 2026, <http://smartdefine.org/whistle_buoy/definitions/1323823>.
MLAWordNet. "whistle buoy" 23 October 2010. Web. 29 September 2026. <http://smartdefine.org/whistle_buoy/definitions/1323823>