What is the coverage angle of the stern light?

The coverage angle of the stern light on a pleasure craft is 135 degrees. This light is specifically required for vessels operating at night to show their presence and position on the water. It is positioned at the back of the vessel and extends forward at an angle of 67.5 degrees on either side from the centerline of the boat. This allows other vessels to see the stern light from a substantial distance, ensuring that they are aware of the boat’s position and direction, particularly in low visibility situations.

Understanding the coverage angle is essential for safe navigation. The angle ensures sufficient visibility while conforming to regulations which dictate how many lights and what angles they should project. The stern light, forming part of the overall navigation light configuration on a vessel, works in tandem with the other lights to provide a complete picture of the vessel's heading and status. Knowing the specific coverage angle helps operators understand their obligations under maritime law and contributes to safer boating experiences.