What is "whistling buoy"

Whistling \Whis"tling\, a. & n. from Whistle, v. Whistling buoy. (Naut.) See under Buoy. Whistling coot (Zo["o]l.), the American black scoter. Whistling Dick. (Zo["o]l.)

1. An Australian shrike thrush ( Colluricincla Selbii).

2. The song thrush. [Prov. Eng.] Whistling duck. (Zo["o]l.)

   1. The golden-eye.

   2. A tree duck. Whistling eagle (Zo["o]l.), a small Australian eagle ( Haliastur sphenurus); -- called also whistling hawk, and little swamp eagle. Whistling plover. (Zo["o]l.)

      1. The golden plover.

      2. The black-bellied, or gray, plover. Whistling snipe (Zo["o]l.), the American woodcock. Whistling swan. (Zo["o]l.)

         1. The European whooper swan; -- called also wild swan, and elk.

         2. An American swan ( Olor columbianus). See under Swan. Whistling teal (Zo["o]l.), a tree duck, as Dendrocygna awsuree of India. Whistling thrush. (Zo["o]l.)

            1. Any one of several species of singing birds of the genus Myiophonus, native of Asia, Australia, and the East Indies. They are generally black, glossed with blue, and have a patch of bright blue on each shoulder. Their note is a loud and clear whistle.

            2. The song thrush. [Prov. Eng.]

Buoy \Buoy\ (bwoi or boi; 277), n. [D. boei buoy, fetter, fr. OF. boie, buie, chain, fetter, F. bou['e]e a buoy, from L. boia. ``Boiae genus vinculorum tam ferreae quam ligneae.''
--Festus. So called because chained to its place.] (Naut.) A float; esp. a floating object moored to the bottom, to mark a channel or to point out the position of something beneath the water, as an anchor, shoal, rock, etc.

Anchor buoy, a buoy attached to, or marking the position of, an anchor.

Bell buoy, a large buoy on which a bell is mounted, to be rung by the motion of the waves.

Breeches buoy. See under Breeches.

Cable buoy, an empty cask employed to buoy up the cable in rocky anchorage.

Can buoy, a hollow buoy made of sheet or boiler iron, usually conical or pear-shaped.

Life buoy, a float intended to support persons who have fallen into the water, until a boat can be dispatched to save them.

Nut buoy or Nun buoy, a buoy large in the middle, and tapering nearly to a point at each end.

To stream the buoy, to let the anchor buoy fall by the ship's side into the water, before letting go the anchor.

Whistling buoy, a buoy fitted with a whistle that is blown by the action of the waves.

n. a buoy that makes a whistling noise [syn: whistle buoy]