What does a flashing buoy signify?

A flashing buoy is designed to convey specific navigational information, particularly related to hazards or conditions that may affect the safety of navigation. The characteristic of a flashing light signifies to mariners that there is a particular navigational condition that requires attention, which could include dangers such as rocks, shallow waters, or other potential hazards. The specific pattern of the flashing light often communicates more detailed information about the nature of the hazard.

While other choices suggest different meanings, they do not accurately describe the primary purpose of a flashing buoy within the IALA system. For instance, although a safe passage may sometimes be indicated by other buoy types, it is not the function of a flashing buoy specifically. Recreational areas and prohibited areas are typically marked by different buoy characteristics or colors that convey those specific messages, further differentiating them from the navigational focus of flashing buoys.