RedactedNarrative: On 05/14/2015 at approximately 1730 hours, the vesse was towing a tube with three (3) occupants on it in a seated position.  The Vessel was traveling at approximately 15-20 MPH in a straight line near Rotory Cove and the tube was outside of the wake.  The tube hit a wave and the occupant in the center of the tube''s head collided with the tube occupant that was ejected.