RedactedNarrative: V1 AND V2 WERE BOTH IN HEAVY SEAS AND MAKING WAY TO SAUGATUCK CHANNEL FOR SAFE HARBOR.  OPERATOR OF V1 STATES THAT DUE TO HEAVY SEAS, THE ERRATIC MANEUVERS OF V2, LARGE WAKE CAUSED BY V2 USE OF HIGH FORCE POWER BACK INTO THE CHANNEL, ALL COMBINED FORCED V1 TO TAKE EVASIVE ACTION TO AVOID COLLISION WITH V2.  V1 BECAME CAUGHT IN V2'S WAKE AND WAS UNABLE TO CONTROL V1 AND COLLIDED WITH SOUTH PIER HEAD.