What sound equipment is required by length?
From 12 m a whistle, from 20 m also a bell, from 100 m also a gong. Under 12 m, any means of making an efficient sound signal.
Rule 33.
Part of the convention Sound and light signals
12 m or more: a whistle. 20 m or more: a whistle and a bell. 100 m or more: also a gong whose tone cannot be confused with the bell. Bell and gong may be replaced by equivalent equipment, but manual sounding must always remain possible.
- Under 12 m she need not carry them, but must be provided with some other means of making an efficient sound signal.
At sea it looks like this
On a yacht a hand-held aerosol horn is enough, but it must be aboard and working, not buried under the sails.
The rule says«A vessel of 12 metres or more in length shall be provided with a whistle, a vessel of 20 metres or more in length shall be provided with a bell in addition to a whistle, and a vessel of 100 metres or more in length shall, in addition, be provided with a gong, the tone and sound of which cannot be confused with that of the bell».
Sound signals
Sound signals
12 / 20 / 100 mWhat must be carried