The Syrians toppled under a hail of Parabellum flesh-eaters seeking targets in one prolonged fifteensecond blast.

Man overboard can also be signaled with three prolonged blasts on the ship's whistle and general alarm bell (Morse code "Oscar").

Somewhere in the distance, off to the west, there was a prolonged blast from the whistle of a passenger engine.

A prolonged blast from a phaser set to full would have vaporized the body.

Eleven more Hurricanes followed, one after the other, each firing a prolonged blast.

After a prolonged blast the Munqu ship finally fell away, venting a trail of plasma behind.

Fuller stepped forward and took careful aim, firing a prolonged blast at the very top of the shield.

The boats' whistles broke out in three deafening, prolonged blasts each.

Definitions of whistle short blast (1 second), and prolonged blast (4-6 seconds).