During which times must navigation lights be displayed on a boat?

Navigation lights are essential for ensuring safety on the water, particularly during low visibility conditions. They serve to alert other vessels to your boat's presence and direction, reducing the risk of collisions. The requirement to display navigation lights from sunset to sunrise is standardized in various maritime regulations. Additionally, in conditions of restricted visibility, such as fog or heavy rain, lights must also be used to enhance visibility and safety. This ensures that all vessels, whether underway or stationary, are visible to each other, contributing to safer navigation practices.

The other options identify situations where navigation lights are not necessarily mandated or practical. For instance, a boat being anchored does not require lights unless specified by local regulations, and operating only during the day overlooks the importance of lighting during low light conditions, which is critical for navigation safety. Each of these scenarios fails to encompass the comprehensive requirements set for navigation lights, highlighting the significance of the proper answer regarding safety protocols on the water.