UNIT ONE TRIED TO UNDOCK AND MAKE A U-TURN TO CHANGE DIRECTION OF TRAVEL. a STRONG OUTGOING TIDE  (CURRENT) OVERTOOK THE BOW THRUSTERS OF UNIT 1. uNIT 1 MADE COLLISION WITH UNITS 2, 3, AND 4 THAT WERE MOORED TO THE MARKER SLIPS. UNIT 2 BOW LIGHTS RIPPED OFF AND ANCHOR PULPIT BENT. UNIT 3 STERN RAIL AND TEAK WERE DAMAGED UNIT 1 STOPPED AND WAITED FOR TiDE TO TURN AT UNIT 4.