According to sound signal regulations, what must a vessel over 12 meters carry?

A vessel over 12 meters in length is required by sound signal regulations to carry both a bell and a whistle. This requirement is in place to ensure safety and communication between vessels, especially in situations where visibility is reduced, such as fog or heavy rain.

The bell serves as a sound signal to indicate the presence of the vessel and can be used to signal to others in proximity during low visibility. Meanwhile, the whistle is utilized for navigating in tight spots or communicating intentions to other vessels. Together, these sound signaling devices enhance safety on the water by allowing vessels to communicate their presence, movements, and intentions effectively, thereby helping to prevent collisions.