In what conditions must vessels display proper lighting arrangements?

Vessels must display proper lighting arrangements in all weather conditions from sunset to sunrise to ensure safety and navigational visibility. This requirement is essential because the lights help other vessels identify the type, size, and activity of the boat, which is critical for preventing collisions. The use of proper lighting is mandated by navigation rules, emphasizing the importance of safety in marine environments, regardless of the weather or the presence of other vessels.

During daylight hours, visibility may be high, and as such, the requirement for lighting is not in effect. In highly congested waters or when other vessels are nearby, while additional caution is warranted, the fundamental rule of maintaining proper lighting still applies continuously from sunset to sunrise, regardless of the situation.