Va. Code § 29.1-734.1: Skin and scuba divers

A. No person shall engage in skin diving or scuba diving from a boat in the waters of this Commonwealth which are open to boating, or assist in such diving, without displaying a diver's flag from a mast, buoy, or other structure at the place of diving; and no person shall display such flag except when diving operations are under way or in preparation or display a diver's flag in a location which will unreasonably obstruct vessels from making legitimate navigational use of the water.B. The diver's flag shall be square, not less than twelve inches on a side, and shall be of red background with a diagonal white stripe, of a width equal to one fifth of the flag's height, running from the upper corner adjacent to the mast downward to the opposite outside corner.C. No operator of a vessel under way in the waters of this Commonwealth shall permit such vessel to approach closer than twenty-five yards to any structure from which a diver's flag is then being displayed.1987, c. 488.