Unit 3 was pulling into Ripley Light Marina at idle speed. Unit 3 veered slightly left in the marina waterway so they could back into their slip on the right side of the waterway. 

Units 1 and 2 were docked on the left side facing the water in their slips. As unit 3 was attempting to dock, unit 3's engines failed causing them to sideswipe units 1 and 2.
Ashley River