RedactedNarrative: Unit 2 was docked w/ no occupants.  Unit 1 was traveling up the cast shore line heading North.  Unit 1 driver leaned over to get a water and boat veered to the right, striking unit 2 in the back.  Unit 1 stated he was traveling 15 to 20 mph.  Both occupants had bruising from impact but refused medical attention.  Unit 2 had damage to outboard, rear deck of boat, ski rack and transom.  Damage to dock from impact.  Unit 1 damage - front tow hook broken, cosmetic damage to hull.