What color is the light on the starboard side of a vessel?

The light on the starboard side of a vessel is green. This color coding is part of the navigation rules established to ensure safe maritime operations. The green light is designed to be visible from a specific angle, allowing other vessels to determine the course and orientation of the vessel displaying it. When two vessels are approaching each other, the presence of a green light indicates that the approaching vessel is on the starboard side and can help determine which vessel has the right of way.

In contrast, the red light is used on the port side of a vessel, while white lights typically indicate either the stern or all-round lights that can be seen from any direction. Blue lights are not standard for navigation purposes on vessels and may represent special situations or vessels. Understanding these color codes is crucial for maintaining safety on the water and avoiding collisions.