What is the purpose of a lighted buoy?

A lighted buoy is specifically designed to signal its position in low visibility conditions, making it easier for vessels to navigate safely. The light emitted by the buoy serves as a visible reference point for mariners, particularly during times of fog, rain, or nighttime when visibility is significantly reduced. This is crucial for preventing collisions and ensuring safe passage in navigable waters.

The other choices reflect different functions that buoys might serve but do not accurately describe the primary purpose of a lighted buoy. While a buoy may support anchoring in certain situations, this is not its main function. Similarly, marking underwater currents or fishing zones involves different types of buoys, which may not necessarily be lighted or intended for signaling. The light on a buoy is integral to enhancing navigation safety, establishing its clear and specific role in maritime aids to navigation.