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Rules of the Road.

Rule 32. Sound & light Signals

Definitions

(B) The Term "short blast" means a blast about one seconds duration.

(c) The Term "prolonged blast" means a blast of four to six seconds duration.

Rule 34 Maneuvering and Warning Signals

International. (a)One Short blast means "I am altering my course to starboard" (right)

Inland. (a) One Short blast means "I intend to leave you on port side" (left)

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Related Questions

What should you do if you hear one prolonged blast?

Stay out of the way! One prolonged blast is the whistle signal for a ship leaving a berth or in a blind bend in a channel.


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