RedactedNarrative: Vessel 1 was docked facing south bound at launch.  Vessel 2 was moored behind vessel 1.  Operator vessel 1 stats he saw another vessel backing out of the launch towards him.  He put vessel in reverse and struck vessel 2.  One person on v1 was injured when he fell in the boat.  One person in v2 was injured when she was ejected and impacted the water.