RedactedNarrative: UNIT 1 WAS ENTERING THE CHARLESTON HARBOR MARINA ATTEMPTING TO DOCK ON THE B DOCK.  ON APPROACH, A LARGE VESSEL WAS ATTEMPTING TO LEAVE THE FAIRWAY BETWEEN DOCK A AND DOCK B.  UNIT 1 SWUNG WIDE TOWARDS DOCK A TO GIVE THE OTHER VESSEL A WIDE BERTH.  THE STRONG OUTGOING TIDE WAS TRAVELING TOWARDS DOCK A.  UNIT 1 WAS UNABLE TO OVERCOME THE POWER OF THE TIDE AND WAS FORCED TOWARDS DOCK A.  UNIT 1 STRUCK SIX VESSELS THAT WERE TIED TO DOCK A CAUSING DAMAGE TO ALL SIX.