- a buoy having a whistle operated by air trapped and compressed in an open-bottomed chamber by the rising and falling water level caused by natural wave action.
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Examples from the Web for whistling buoy
The fog-bell was tolling, and yells of agony came from the whistling-buoy.
When Wilbur came on deck again he noted that the "Bertha Millner" had already left the whistling-buoy astern.Moran of the Lady Letty
The bellow of the whistling-buoy nine miles out, off the coast, was audible at firesides.