Collision Regulations | Sound Signals |
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Sound Signals
All boats over 12 m should carry sound signals, a whistle and a bell.
Vessels under 12 m should have some means for making an efficient sound signal.
You should be aware of sound signals and what action you should take when you hear a sound signal. Sound signals may be accompanied by light signals.
Manoeuvring and Warning
The following sound signals must be used when manoeuvring a vessel or warning an approaching vessel.
The definition of a "short" signal blast is a sound signal up to 1 second in duration.
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One short blast means 'I am altering my course to starboard'. |
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Two short blasts mean 'I am altering my course to port'. |
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Three short blasts means 'I am operating engines astern' (the boat may be reversing or stopping). |
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Five (or more) short blasts mean 'I am unsure of your intentions'. |
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