What is the primary function of navigation lights?

The primary function of navigation lights is to help avoid collisions during low visibility. These lights serve as essential safety features for vessels operating at night or in poor visibility conditions, such as fog or rain. They are strategically placed on different parts of a vessel and emit specific colors and patterns to convey important information to other mariners regarding the size, direction, and manner of movement of the vessel.

For instance, a red light typically indicates the port side, while a green light indicates the starboard side, allowing mariners to determine the relative position and direction of approach of other vessels. This system of lights is crucial in preventing maritime accidents, as it enables navigators to understand and interpret the movements of nearby vessels effectively, enhancing safety on the water. The use of navigation lights is a standardized practice recognized internationally, which underscores their critical role in maritime navigation and safety.