ON SATURDAY JULY 30, 2011, AT APPROXIMATELY 2:30PM ON LAKE TILLERY, VESSEL 1 WAS DRIFTING CLOSE TO HIS DOCK NOT UNDER POWER WITH 3 OCCUPANTS ON A TOWABLE RAFT.  THE OPERATOR OF VESSEL 2 WAS HEADING SOUTH WITH ONE OCCUPANT AND ALSO PULLING A TOWABLE RAFT.  THE OPERATOR OF VESSEL 2, WAS TURNED BACKWARDS OBSERVING THE RAFT HE WAS TOWING.  Operator2 MADE A TURN TO HIS PORT SIDE IN ORDER TO SLING THE TOWABLE RAFT.  NOW HEADING IN AN EASTERLY DIRECTION AND STILL TURNED BACKWARDS, Operator2 CAME INTO A CLOSE PROXIMITY WITH THE OCCUPANTS OF THE TOWABLE RAFT BEHIND VESSEL 1.  WHEN HE TURNED BACK FORWARD, HE RELEASED THE THROTTLE REDUCING HIS SPEED, BUT AT THE SAME TIME LOSING STEERING OF THE PWC (VESSEL 2).  AT THIS TIME, Operator2  STRUCK THE TOWABLE RAFT BEHIND VESSEL 1 CAUSING INJURY BEYOND FIRST AID.  WHEN Operator2 STRUCK THE TOWABLE RAFT, HE WAS AT A REDUCED SPEED AND HIT THE RAFT WITH A GLANCING BLOW ONLY HITTING one person.
TROY                          