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A diver down flag, or scuba flag, is a flag used to indicate that there is a diver below. It is red with a white stripe from the upper left corner to the lower right corner. It can be placed on a boat or on a surface marker buoy. (Practice about this choice of flag is not uniform worldwide. In some countries, the practice is to use the blue-and-white A-flag - Signal flag ALFA/ALPHA - instead.) It is used to notify to any boats to steer clear for the safety of the diver.
The use of this flag is required by law or regulation in many US states and Canada, as well in several other countries in the world. Usually the regulations require divers to display the flag and to stay within a specified distance of it when they are near the surface. As well there is often a larger zone around the flag where no boats are allowed to pass. Some states also prohibit the display of this flag when there is no diver in water.
Signal flag ALFA/ALPHA
As a code signal the international Signal flag A (letter ALFA/ALPHA) has the meaning of "I have a diver down; keep well clear at slow speed",used to indicate the presence of a diver in the water, and is more commonly employed in Europe and the British Commonwealth, including countries such as United Kingdom, Ireland, Israel, Australia, New Zealand, South Africa, and Kenya.
A rigid replica of the 'A' flag is required to be displayed by any vessel engaged in diving operations, when restricted in her ability to maneuver, if the size of the vessel makes it impractical to display the shapes and lights required by the International Rules for Prevention of Collisions at Sea (IRPCS) Rule 27.
Although the presence of the 'A' flag may afford some protection for divers in the vicinity of the vessel displaying the flag, the intention of the rigid replica required by IRPCS Rule 27 (e) is to warn other vessels of the danger of collision. This marks a distinction between the 'A' flag and the the red and white diver down flag. |