What does the Alpha flag signify in maritime communication?

The Alpha flag in maritime communication signifies "Diver Down." This flag is a signal used by vessels to indicate that divers are in the water, and it serves as a cautionary notice to other vessels in the area. When the Alpha flag is displayed, mariners are required to maintain a safe distance from the flagged vessel to ensure the safety of the divers below.

This practice is crucial for preventing accidents and ensuring that both the divers and surrounding vessels can operate safely and effectively. The use of such flags is governed by the International Code of Signals, which provides a standardized method for conveying important safety information at sea.

In this context, it is essential to understand that the other options represent different meanings in maritime communication, but the specific significance of the Alpha flag is indeed related to diver safety.