THE OPERATOR OF UNIT 1 ENTERED THE STONO RIVER FROM CAPRI CREEK AND THE STONO WAS VERY ROUGH. THE OPERATOR MADE A TURN TO PORT AND THE WAVES CAUSED BOTH OCCUPANTS TO BE TOSSED OVERBOARD. PASSENGER SWAM BACK TO BOAT. THE OPERATOR DROWNED BEFORE HE WAS RESCUED. The operator had a BAC of .18.