RedactedNarrative: According to Operator2, as he started to plane of his boat he heard a man's voice.  Operator2 stated that there had been a boat to his left as he throttled forward.  Operator2 said that he wasn't sure if the waves had turned his boat or if he had inadvertently turned his vessel toward the boat on his left.  Nevertheless, Operator2's vessel struck another vessel.  The boats collided with the bow of Operator2's boat hitting the starboard side of Operator1's boat at or near the operator's station.  Operator1 said that the other boat struck him in the shoulder area and complained of pain.  Operator1 refused medical treatment at the time and said that he would get the shoulder looked at when he got back home.