Which rule outlines the requirements for sound signal equipment in COLREGs?

Rule 33 of the COLREGs specifically addresses the requirements for sound signaling devices on vessels. It stipulates that vessels must be equipped with sound signaling appliances to help prevent collisions, especially in restricted visibility. This rule is essential because sound signals play a critical role in maritime navigation, aiding communication between vessels that may not be able to visually identify each other due to fog, rain, or darkness.

According to Rule 33, the type of sound signaling equipment required (such as a whistle, horn, or other devices) depends on the vessel's size and the nature of its operations. This ensures that all vessels are adequately prepared to signal their presence and intentions to other vessels, thereby enhancing safety on the water. Understanding this rule is fundamental for anyone involved in maritime navigation and safety practices.