A vessel over 50 meters in length is required to display what?

For a vessel over 50 meters in length, it is required to display two mast lights. This requirement is outlined in the International Regulations for Preventing Collisions at Sea (COLREGs), which provide guidelines for the navigation lights that vessels must display to ensure safe navigation and reduce the risk of collisions.

The two mast lights are typically positioned one above the other at the mast, with the upper light being white and the lower light also being white but of a reduced intensity. This configuration helps indicate the length and size of the vessel to other vessels, ensuring that other operators can accurately assess the vessel’s position and heading.

Having two mast lights is specifically mandated for vessels exceeding 50 meters in length to enhance their visibility from a distance and to ensure compliance with safety regulations. Thank you for clarifying that other options do not fulfill the specific requirements set forth for larger vessels in navigational contexts.