Scuba divers must display a warning flag when diving:
The diver’s flag must measure at least 15 inches horizontally and 12 inches vertically.
Both sides must have a red-colored background bisected diagonally by a three-inch wide white stripe.
There is also a blue and white diver’s flag authorized under the federal rules of the road.
No more than four divers shall dive under one flag.
Divers must remain within 50 feet (measured horizontally) of the warning flag.
If a group of divers is using a contained area, the perimeter of the area must be marked:
The area must be outside the normal area of navigation.
These markings must consist of the official diver’s flag and must be placed around the perimeter of the diving area at intervals of not more than 150 feet.
Do not place a diver’s flag where it will obstruct navigation.
The diver’s flag may be displayed on a watercraft or float or be anchored to the bottom.
The top of the flag must be at least 30 inches above the surface; however,
boats not involved with the diving operation must remain 150 feet away from
a flag.
Persons who dive at any time from sunset to sunrise must carry a diver’s light visible when above the water for a distance of 150 feet.
Scuba or skin diving while in possession of a spear is unlawful from sunset to sunrise.
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