What color buoy indicates safe passage in foggy conditions?

The color white is associated with lighted buoys that convey instructions and guidance to mariners. In foggy conditions, a lighted white buoy serves as an important navigational aid, effectively helping vessels to determine safe passage and avoid hazardous areas. The illuminated white signal is easily visible in low visibility scenarios, providing clear direction to ensure safe navigation.

While red and green buoys typically indicate specific channel sides or hazards, and yellow buoys often denote special marks or specific areas (like mooring or regulatory limits), it is the lighted white buoy that stands out as the most effective option for indicating safe passage in fog. This is because the white light can cut through fog and other obstructive weather conditions, functioning as a reliable point of reference for navigation when visibility is compromised.