Adventures in Boating Washington Handbook
The Official Boating Handbook of the Washington State Parks - Web Version
Table of Contents
Any vessel involved in diving operations where persons are scuba diving, skin diving, or snorkeling from a vessel must display a rigid replica of the Alfa flag to mark its diving operation.
If diving at night, three all-round lights in a vertical line must be displayed where they can be seen best. The highest and lowest lights must be red with a white light in between.
A rectangular red flag with a white diagonal stripe may be used to indicate the presence of a submerged diver in the area, but it does not meet the state and federal requirements for display.
A blue and white International Code Flag A (or Alfa Flag), at least 3.3 ft. high and visible from all directions, is required and must be displayed on vessels restricted in their ability to maneuver by the diving operation.
A brilliant orange or bright red flag at least 12 x 12 inches and mounted on a pole at least 24 inches long.
Washington law states that vessels towing person(s) on water skis, a wakeboard, an inner tube, or any other similar devices must carry and use a skier-down flag whenever the towed person(s) is preparing to ski or has fallen into the water.
Remote-operated PWC (designed to be operated by a towed person) must have a skier-down flag attached to the PWC.