What does the Alfa Flag signify when displayed on federally controlled waters?

The Alfa Flag, also known as the Alpha flag, is a blue and white international code flag that signifies a specific message when displayed on federally controlled waters. Its primary meaning is to warn nearby vessels that a diver is down in the water and that vessels should keep clear to ensure the safety of the divers. This flag is part of the International Code of Signals used worldwide to convey important safety information at sea. By recognizing the flag as a signal for diver presence, recreational and commercial boats are reminded to navigate carefully and avoid areas where divers may be underwater, thus promoting safety for all individuals in the water.

Other options do not accurately reflect the meaning of the Alfa Flag. It's not a weather signal, a general warning about hazards, or something that applies exclusively to recreational boating. Instead, it is specifically concerned with ensuring the safety of divers, which is why recognizing the Alfa Flag is crucial for anyone navigating in waters where divers might be present.