2009 Washington State Boating Law
RCW 79A.60.170
Water skiing safety -- Requirements.
(1) The purpose of this section is to promote safety in water skiing on the waters of Washington state, provide a means of ensuring safe water skiing and promote the enjoyment of water skiing.
(2) No vessel operator may tow or attempt to tow a water skier on any waters of Washington state unless such craft shall be occupied by at least an operator and an observer. The observer shall continuously observe the person or persons being towed and shall display a flag immediately after the towed person or persons fall into the water, and during the time preparatory to skiing while the person or persons are still in the water. Such flag shall be a bright red or brilliant orange color, measuring at least twelve inches square, mounted on a pole not less than twenty-four inches long and displayed as to be visible from every direction. This subsection does not apply to a personal watercraft, the design of which makes no provision for carrying an operator or any other person on board, and that is actually operated by the person or persons being towed. Every remote-operated personal watercraft shall have a flag attached which meets the requirements of this subsection. Except as provided under RCW 79A.60.020, a violation of this subsection is an infraction under chapter 7.84 RCW.