RedactedNarrative: Vessel 1 with Operator and Passenger traveling in front of Vessel 2 with only Operator.  Vessel 1 made sharp turn to left.  Vessel 2 Operator struck Vessel 1 causing injury to passenger.  It was determined that Vessel 1 made the turn for no evasive reason, failing to maintain his course, which was major factor in causing the crash and Vessel 2 Operator was operating too fast for the condition, the speed was not controlled failing to avoid a collision.