On June 26, 2009 at approximately 2230, I received a call from dispatch about a boat wreck that had occured near the elbow turn of Lake Murray in Lexington County. Upon arriving on the scene, there were two boats involved that had collided. Unit 2 had six occupants and five of these were sent to the hospital. Out of these five, subject 1 was injured with a broken arm and subject 2 sustained sholder and back injuries. After the subjects were sent to the hospital, I began obtaining statements from both operators with the assistance of three officers. Unit 1 had been heading southbound and Unit 2 had been heading northbound, Unit 2 was traveling approximately twenty-five mph and encountered three pontoon boats traveling side-by-side and went to go around them. Unit 1 was traveling behind the three pontoons. Unit 2 came around the pontoons, the operator did not see Unit 1 until it was too late and collided with the port side of Unit 1. Unit 1 was only traveling approximately four knots and took all evasive actions to avoid Unit 2 but was not able to. The next day, I went back to both parties to obtain photographs of both vessels, and statements from the individuals who had been taken to the hospital. The operator of Unit 2 was then charged with improper lookout under 50-21-170 Coast Guard Navigational Rule 5.