OUPV & 100-Ton Master · Required Equipment
A vessel is required to carry an efficient sound-producing device. On a vessel 12 meters or more in length the Navigation Rules also require a:
- ABell✓ Correct
- BFoghorn powered by the engine only
- CPublic-address system
- DAir horn rated above 120 decibels
Explanation
Rule 33 requires vessels 12 meters or more to carry both a whistle and a bell. Vessels under 12 meters need only some means of making an efficient sound signal. The bell is used at anchor in restricted visibility.
Authority: Navigation Rules, Rule 33; 46 CFR 25.30
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