Do you see it?
What does it mean?
According to the Official Massachusetts Boating Handbook it is required equipment. “All persons scuba diving, skin diving, or snorkeling must display a red and white divers flag. Divers or snorkelers must remain within 100 feet of the divers flag.
If possible, vessel operators not engaged in the diving operation should stay at least 100 feet from a displayed flag. If not possible, vessel operators must reduce speed to no more than three miles per hour. Two types of flags are used to indicate diving activity.
Divers Flag: A rectangular red flag with a white diagonal stripe, at least 12 x 15 inches in size and constructed of rigidly supported material. This flag must be displayed on a vessel or surface float and must extend a minimum distance of three feet up from the surface of the water.
Alfa Flag: A blue and white International Code Flag A (or Alfa flag), flown from a vessel restricted in its ability to maneuver. This flag indicates that a vessel is involved in a diving activity. The Alfa flag may be displayed in addition to the divers flag but does not replace the divers flag.