What lighting arrangement does a power-driven vessel longer than 50 meters exhibit?

A power-driven vessel that is longer than 50 meters is required to exhibit a specific lighting arrangement, which includes a masthead light, a second masthead light, sidelights, and a stern light. This arrangement is essential for ensuring that the vessel is visible to other vessels and that it can be identified as a power-driven vessel while underway, particularly in conditions of restricted visibility or at night.

The masthead lights indicate the direction in which the vessel is moving and are positioned above the sidelights so they can be seen from a greater distance. The second masthead light allows for better visibility and indicates the vessel's length, which is critical for other vessels to gauge the appropriate distance when navigating nearby. Sidelights aid in identifying the vessel’s port and starboard sides, while the stern light provides indication from the rear. This comprehensive lighting configuration enhances safety by preventing collisions and ensuring compliance with maritime navigation rules.