Sound Signals – BoatSafe.com

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Sound Signals

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

One Prolonged Blast 1 Prolonged Blast Short Blast 1 Short Blast One Stroke on the Bell 1 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 Blast Short Blast Short Blast
3. Power driven vessel underway
but stopped and making no way
Every Two Minutes
One Prolonged Blast One Prolonged Blast
4. Vessel at anchor
less than 100 meters
Every
Minute
One Stroke on the Bell One Stroke on the Bell One Stroke on the Bell One Stroke on the Bell One Stroke on the Bell
5 seconds of rapid ringing
5. Vessel aground
less than 100 meters
Every
Minute
One Stroke on the Bell One Stroke on the Bell One Stroke on the Bell 3 strokes
One Stroke on the Bell One Stroke on the Bell One Stroke on the Bell One Stroke on the Bell One Stroke on the Bell
5 seconds rapid ringing
One Stroke on the Bell One Stroke on the Bell One Stroke on the Bell 3 strokes

Also see the Basic Boating Safety Course

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