What is the primary purpose of a lighted buoy?

The primary purpose of a lighted buoy is to indicate navigable water. Lighted buoys are essential aids to navigation that help boaters determine safe channels and areas where it is safe to navigate. They are strategically placed in various water bodies to provide visual cues, especially at night or in conditions with low visibility. By marking navigable areas, lighted buoys guide vessels away from hazards and assist in safe passage through channels, thus playing a critical role in maritime safety. The illumination of these buoys enhances their visibility, ensuring that they can be seen from a distance, which is particularly important for night navigation.

While other options may involve buoys in specific situations, they do not encompass the primary and essential function of lighted buoys for ensuring safe navigation.