RedactedNarrative: UNIT 1 IS A TWO SEAT KAYAK. UNIT 1 FLIPPED OVER PUTTING TWO OCCUPANTS IN THE WATER. ONE OCCUPANT WEARING A TYPE III PFD SWAM TO SHORE AND THE SECOND OCCUPANT WAS WEARING A TYPE IV PFD WHICH CAME OFF AS THE OCCUPANT ENTERED THE WATER. SUBJECT COULD NOT SWIM AND AFTER SURFACING A FEW TIMES THE SUBJECT WAS NOT SEEN AGAIN.