Unit 1 was traveling west on Lake Keowee from Warpath landing towards Wynwood point. Unit 2 was also traveling west on Lake Keowee from Warpath landing towards Hwy 183 bridge. Unit 1 decrased speed to idle to allow unit 2 to catch up at the same time unit 2 increased speed to catch up. Unit 2 struck unit 1 on the right side causing damage from right rear to right front of the boat. Several injuries were reported a total of 6 persons were treated and released for minor injuries.