What is the primary purpose of navigation lights on a boat?

The primary purpose of navigation lights on a boat is to help others identify the size, direction, and status of the vessel. These lights are crucial for safe boating, especially during hours of darkness or in reduced visibility conditions. They enable other boaters to ascertain whether a vessel is moving, anchored, or at rest, and indicate its orientation and action.

By understanding the specific configurations and colors of navigation lights, which adhere to international standards, other vessels can determine safe passing distances, avoid collisions, and navigate waters more effectively. This system enhances safety on the water, facilitating communication without the need for verbal cues or signals, which could be misunderstood.

Other options do not capture the essential function of navigation lights. For instance, illuminating the interior for passengers is not a navigational purpose, attracting fish does not relate to navigation safety, and providing light only when docking limits their crucial role in overall maritime safety.