When must vessel operators use navigation lights?

Vessel operators must use navigation lights when away from the dock between sunset and sunrise to ensure visibility and safety on the water. These lights are critical for helping other vessels see your boat in low-light conditions, such as at night or during times of reduced visibility.

Using navigation lights during these hours provides a clear indication of a vessel's presence, direction, and status, which is essential for preventing collisions. The requirement to display navigation lights is established by boating regulations to promote safety among all watercraft and protect both operators and passengers.

The other options do not encompass the full range of safety needed for boating after dark or in conditions of low visibility, making them unsuitable in this context.