When is it permissible to have running lights on during the day?

Running lights are essential for ensuring the visibility of a vessel to others, particularly in conditions where visibility is compromised. It is permissible to have running lights on during the day in restricted visibility. This includes situations such as fog, heavy rain, or any other conditions that significantly reduce the ability to see. The use of running lights in these conditions helps prevent collisions by making a vessel more recognizable to others on the water.

While running lights are typically not necessary in clear visibility and are not required when anchored, they serve a crucial role in safety during restricted visibility. This acknowledgment of the importance of running lights helps ensure that navigational practices prioritize safety on the water.