What is the function of a buoy marked with a specific symbol?

The function of a buoy marked with a specific symbol is to signal regulations or restrictions in the area. This is important for mariners as it communicates vital information about rules that must be followed in the surrounding waters. For instance, it may indicate no anchoring zones, speed limits, or other navigational directives that ensure the safety and proper conduct of vessels operating in that location. The symbols used on these buoys are standardized, allowing mariners to quickly recognize and interpret the message conveyed, promoting safe navigation and compliance with maritime law.

In contrast, buoys that indicate shallow waters, provide information about nearby facilities, or mark the entrance to a harbor serve different specific purposes. For example, those indicating shallow waters warn of potential navigational hazards, while buoys for nearby facilities might direct users to docks or supply points. Similarly, harbor entrance buoys are primarily for guiding vessels into designated entry points. Each type of buoy plays a distinct role in maritime navigation, but the primary function of the buoy referenced in the question pertains to signaling specific rules or restrictions.