What is a dive flag and its purpose?

A dive flag is a specialized flag used to indicate that divers are present in the surrounding water. Its primary purpose is to ensure the safety of divers by alerting boats and other watercraft to their presence, thereby reducing the risk of collisions and ensuring that those in the vicinity exercise caution. The flag serves as a communication tool, signaling to both recreational and commercial vessel operators that they should steer clear of the designated area where divers are likely to be submerged.

The common designs for dive flags include the red flag with a white diagonal stripe (commonly used in the United States) and the international code flag "A" (a blue-and-white flag), and both convey the same critical message. By raising a dive flag, divers establish a clear visual cue that helps protect not just themselves but others involved in aquatic activities.