RedactedNarrative: Vessel 1 was partially on a lift without passengers.  Vessel 2 came into shore after two attempts and then left some time later. A witness stated that when the boat came in he saw the lift and boat move.  Operator of vessel 2 is persistent that he did not hit vessel 1 nor the lift.  Review by officers found slight damage to the front starboard fin of vessel 2, that appeared to be fresh and caused by a forward motion.