RedactedNarrative: UNIT 2 WAS HEADING SOUTH ON THE MAIN CHANNEL OF LAKE KEOWEE AND UNIT 2 WAS IN THE AREA OF ISLAND #9 AND THE COVE ENTRANCE OF HIGH FALLS. UNIT 1 COLLIDED WITH THE STARBOARD SIDE TRANSOM OF UNIT 2 CAUSING CATASTROPHIC DAMAGE TO BOTH VESSELS AND CAUSING BOTH UNITS TO TAKE ON WATER AND LATER SUBMERGE. THE UNIT 1 OPERATOR WAS TRASPORTED BY EMS FOR LACERATION TO HIS RIGHT CHEST REQUIRING 8 STITCHES AND WAS LATER ISSUED A CITATION FOR NEGLIGENT BOAT OPERATION.