Navigation lights are required to be displayed from sunrise to sunset and at times of reduced what?

Navigation lights are required to be displayed from sunrise to sunset and at times of reduced visibility to ensure the safety of all vessels on the water. Reduced visibility can occur due to various factors such as fog, rain, or darkness. During these conditions, it can be challenging for operators to see other boats or obstacles, making it essential to have navigation lights visible to indicate a vessel's position, heading, and status. This requirement helps prevent collisions and ensures that all boat operators are aware of each other's presence, enhancing overall safety on the water.

While speed, weather, and traffic can all influence boating safety in different ways, they do not specifically mandate the use of navigation lights like visibility does. The primary concern during times of reduced visibility is to improve the likelihood of seeing and being seen by other vessels, which is why this aspect is emphasized in boating regulations.