RedactedNarrative: The operator departed Old Greenwich Yacht Club with 3 passengers on board with the intent to go tubing in the area of Great Captains Island and Island Beach. The passengers took turns tubing. The operator and passenger/observer were towing the  two tubers/victims behind the vessel in a tight, clockwise direction which made the tube go side to side as it rode on top of the wake.  The passenger/ observer informed the operator that the tubers/victims had fallen off the tube. The operator stated that there was a delay as far as when she was notified by the passenger/observer when the tubers/victims fell off the tube. The operator stated while turning clockwise she began to head for the tubers/victims.  The vessel's bow hit the vessels wake causing the operator to lose sight of the tubers/victims.  As the operator approached the tubers/victims, the operator realized that if she continued the vessels direction she would hit the tubers/victims. The operator turned the vessel to the right as a fast as she could to avoid hitting the tubers/victims.  Tuber 1/victim 1 stated that she recognized that the vessel was heading straight towards her and tuber 2/victim 2.  Tuber 1/victim 1 was able to avoid a direct hit from the vessel because she swam away from the vessel.  Tuber 1/victim 1 suffered a laceration to her lower leg from the vessel's  propeller. Tuber 2/victim 2  was struck by the vessel's propeller and suffered a complete evisceration to her torso and was unresponsive when she was retrieved from the water by the operator.