What does it mean when a boat displays a red flag with a diagonal white stripe?

When a boat displays a red flag with a diagonal white stripe, it serves as a warning signal indicating that there are divers in the water. This flag is used to alert other boaters to exercise caution and to keep their distance, as divers may be submerged and require a safe environment to resurface. Recognizing this signal is crucial for the safety of both the divers and the vessels, as it helps prevent accidents and ensures that the divers can work without the risk of being disturbed or endangered by nearby boats.

Understanding the context of signal flags on the water helps boating participants recognize and respect these essential safety measures. In contrast, other flags have different meanings. For example, some flags may indicate that water skiing is in progress or that fishing is allowed or not. However, the specific red flag with a white stripe is strictly associated with the presence of divers. This knowledge is vital for safe boating practices and compliance with maritime regulations.