RedactedNarrative: Vessel #2 attempted to turn 180 degrees and maneuver out between the launching docks, after launching.   Vessel #2 collided with Vessel #1 on both vessels port sides causing paint transfer and scratches to both vessels as well as a dent running approximately 3 feet long along the side of vessel #1.  An Area approximately 5 inches square within this dent was more deeply dented than the rest, although not creased,  Vessel #1 had just launched and was parked next to the dock, with no occupants on board. Photographs were taken and will be submitted with the county case number, related to this accident report. C15-14509.