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What Does Prolonged Blast And Two Short Blasts Mean? [Solved]

Restricted Visibility Restricted Visibility One prolonged blast, plus 2 short blasts at intervals of not more than two minutes apart, is the signal used by sailing vessels. Make way for large commercial vessels -who will sound their horns to boaters to move out of the main shipping channel.

Colregs Sound Signals - Rule 34 Manoeuvring and Warning Signals

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Maritime sound signals

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Colregs Sound Signals - Rule 35 Sound Signals in Restricted Visibility

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