Vessels 12 meters in length or more are required to carry which of the following items along with a whistle?

Vessels that are 12 meters in length or longer are required to carry a sound signaling device in addition to a whistle. The purpose of this requirement is to ensure that vessels can communicate with other boats or indicate their presence in conditions where visibility may be limited, helping to prevent collisions and ensure safety on the water. A sound signaling device can include devices like air horns or other approved sound-producing means that can effectively signal both day and night.

While other options may be useful equipment for certain situations, they do not fulfill the regulatory requirement set forth for sound signaling specifically. Vessels are mandated to carry these devices to help ensure safe navigation and compliance with maritime safety regulations, thus emphasizing the importance of maintaining proper communication on the water.