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Sound Signals

Vessels are required to produce sound signals
under conditions of restricted visibility.

One Prolonged Blast1 Prolonged Blast Short Blast1 Short BlastOne Stroke on the Bell1 Stroke on the Bell
Vessel:
Time
Interval:
Sound Signal:
1. Power driven vessel making way
Every Two Minutes
One Prolonged Blast
2. Vessel not under command,
restricted in ability to maneuver,
a vessel constrained by her draft,
a sailing vessel, a vessel engaged
in fishing and a vessel engaged
in towing or pushing
Every Two Minutes
One Prolonged BlastShort BlastShort Blast
3. Power driven vessel underway
but stopped and making no way
Every Two Minutes
One Prolonged BlastOne Prolonged Blast
4. Vessel at anchor
less than 100 meters
Every
Minute
One Stroke on the BellOne Stroke on the BellOne Stroke on the BellOne Stroke on the BellOne Stroke on the Bell
5 seconds of rapid ringing
5. Vessel aground
less than 100 meters
Every
Minute
One Stroke on the BellOne Stroke on the BellOne Stroke on the Bell3 strokes
One Stroke on the BellOne Stroke on the BellOne Stroke on the BellOne Stroke on the BellOne Stroke on the Bell
5 seconds rapid ringing
One Stroke on the BellOne Stroke on the BellOne Stroke on the Bell3 strokes

Also see the Basic Boating Safety Course

 

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