RedactedNarrative: V1 WAS NAVIGATING IN LAKE ST. CLAIR AND STRUCK A LARGE WAVE.  AFTER STRIKING WAVE V1 BEGAN TO TAKE ON WATER AND SANK IN LAKE ST. CLAIR.  PFDS WERE ON V1 AND USED, BUT UNKNOW IF WORN BEFORE OR BECAUSE OF ACCIDENT.  SHERIFF'S DEPARTMENT WAS CALLED CONCERNING FAULTY EQUIPMENT.  THEY ARE UNSURE IF V1 HAD A HOLE IN THE BOTTOM OR IF THE ENGINE FAILED.  ALCOHOL WAS NOT A FACTOR.  ARREST WAS FOR UNREGISTERED VESSEL.