One longed blast is a notice signal. Five short, fast blasts are utilized signal danger or to signal that you don't comprehend or you can't help with the other boater’s intentions.
Further Explanations:
Sound sign:
Let different boaters know where you are situated during times of restricted visibility, such as extreme fog. If you hear the mist sign of a vessel you can't see, slow to a base speed until you are sure certain there isn't a danger of collision.
One delayed blast less than 2 minutes:
One delayed blast at intervals of not over two minutes is the sign utilized by power-driven vessels when underway.
One delayed blast plus 2 Short blasts:
One delayed blast in addition to two short blasts at intervals of not over two minutes is the sign utilized by sailing vessels.
One delayed Blast:
One delayed blast is a notice signal (for instance, utilized when coming around a blind bend or leaving the dock.
At least five short blasts:
(At least five) short, fast blasts are utilized to signal danger or to signal that you do not understand or you can't help with the other boater’s aims.
Answer Details:
Subject: Physics
Level: High School
Key Words:
Sound sign
One delayed blast less than 2 minutes
One delayed blast plus 2 Short blasts
One delayed Blast
At least five short blasts
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