No, we don't have that flag onboard. However I have seen Navy divers use it from a small boat when doing a training dive where local boaters were more likely to recognize that flag. They were still flying the Alfa flag though.
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Depending where you are diving, either flag can be construed as a water-skier slalom marker, fishing casting target, speed boat turn marker - and I probably missed some others. Don't underestimate the stupidity and / or ignorance of boaters and rely entirely on your flag for safety.
Actually the meaning for the Alfa flag was spelled out in the International Code of Signals (pub102) way before it was incorporated into the COLREGS. The code states that a signal may be made by any station which is defined as "a ship, aircraft, survival craft, or any place at which communications can be effected by any means. " Alfa definitely does have a meaning when flown from a station other than a boat. It is common to see it flown on a pier at Naval bases if divers are working from the pier.
No we don't. We use the Alpha Flag.Does the US Navy use a red and white diver down flag? Canadian ships don't
No we don't. We use the Alpha Flag.