RedactedNarrative: OPERATORS OF VESSEL ONE AND VESSEL TWO WERE OPERATING PARALLEL TO ONE ANOTHER HEADING THE SAME DIRECTION.  OPERATOR OF VESSEL TWO THEN OPERATED HIS PWC TO THE LEFT MAKING A WIDE CIRCLE TURN.  OPERATOR OF VESSEL ONE SLOWED HIS PWC AND TURNED TO THE LEFT AND STOPPED.  AS OPERATOR OF VESSEL TWO CAME OUT OF HIS CIRCLE TURN TO HIS RIGHT, HE OBSERVED VESSEL ONE IN FRONT OF HIM, BUT COULDN'T STOP AND STRUCK VESSEL ONE ON THE BOW, PORT SIDE.