Originally Posted by Rev22:17
Originally Posted by With regard to blasts on ship's whistles when leaving a pier, you
actually it is a Manoeuvring and Warning Signal under the International Collision regulations act
Rule 34 also prescribes other whistle signals that you might hear as a ship enters or leaves a harbor and when within sight of other ships on the high seas. Note that a ship that is leaving a pier in the forward direction sounds only the prolonged blast.
For those who care, Rule 32
sets the lengths of the blast and the requirements for the whistle itself.
Now that you are studying up on signals you could get your boating license.