ashleyann8643 ashleyann8643
  • 18-05-2017
  • Physics
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What does one prolonged blast emitted by boat a using an efficient sound producing device indicate?

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Eku
Eku Eku
  • 27-05-2017
A single prolonged blast emitted by a boat using an efficient sound producing devices indicates that the boat is leaving the dock. It may also be used to indicate that the boat is moving and for alarming other vessels, but in this case, one prolonged blast is followed by two short blasts, in two minutes of time. 
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