Cycles without an engine in international traffic shall: (a) have an efficient brake; (b) be equipped with a bell capable of being heard at a sufficient distance, and carry no other audible warning device ...
A vessel of 12 m or more in length shall be provided with a whistle, a vessel of 20 m or more in length shall be provided with a bell in addition to a whistle, and a vessel of 100 m 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.
