What does the Alfa Flag indicate when displayed on a vessel?

The Alfa Flag, which is a blue and white flag displayed on vessels, specifically indicates that a vessel is involved in a diving activity. This flag serves as a signal to other boats in the area that there are divers in the water. The purpose of displaying the Alfa Flag is to ensure the safety of the divers as it alerts other vessels to maintain a safe distance and be cautious while operating in the vicinity. By following this protocol, the diving crew can work without the added risk of boats passing too close, which could endanger their safety.

Other choices may refer to different flags or signals that denote varying statuses of a vessel. However, the Alfa Flag is distinctly recognized within maritime signaling for diving operations, making it crucial for the associated safety measures on the water.