RedactedNarrative: Vessel #2 was moored when he was struck by vessel #1.  The moorings are very close to each other about 20 yards apart.  Vessel #1 engine's were running and unbeknownst to the operator the vessel was clutch ahead.  When he dropped the mooring line he jolted toward vessel #2 striking it several times causing property damage to vessel #2.  No injuries.