What does a red flag with a white diagonal stripe indicate while boating?

The red flag with a white diagonal stripe is specifically used in boating to indicate that there is a diver in the water. This signal is crucial for safety, as it alerts other boaters to proceed with caution in that area to avoid accidents and to ensure the safety of divers who may be surfacing. Recognizing this flag is important for all boat operators to help maintain a safe environment on the water. It is a standard marking recognized in many boating regulations and helps to protect individuals engaged in underwater activities.