RedactedNarrative: OPERATOR OF VESSEL 1 WAS UN-DOCKING AND REVERSED VESSEL 1 ON THE PORT SIDE TURNING 90 DEGREES, HE THEN STARTED TO DRIFT STARBOARD TOWARDS DILLON MARINA A-DOCK.  OPERATOR 1 ACCELERATED RAPIDLY COLLIDING WITH THE ENGINE OF VESSEL 2 DOCKED IN SLIP OF THE MARINA.  NO ALCOHOL OR DRUGS WERE APPARENT.