RedactedNarrative: The Victim, one of four persons aboard Vessel 1, was sitting on the starboard side gunwale of Vessel 1 with a type 4 PFD around his neck.  While Vessel 1 was in motion, the Victim then fell overboard, backwards, into the water.  The Operator immediately stopped Vessel 1 and jumped into the water to try to retrieve the Victim.  After entering the water, the Operator swam to where the type 4 PFD was floating on the water's surface, but was unable to locate the Victim.