chrisch:Isn't that the DAN flag? Or the Swiss Navy?
String - I just have a vison of that big blow-up leek Max Boyce had as the new SMB...
(That will confuse the yanks).
Chris
Actually, here's a good write up of the history of the flag.
In the US, the laws vary from state to state. For Florida's overview of the law, look here. What isn't mentioned there is the FINES that are now being levied against boaters who buzz dive flags and or otherwise disregard the use of the flag at appropriate times.
Different states, different laws. Outside of the US the Alpha flag is more widely used.