RedactedNarrative: V1 WAS TOWING TUBE WITH THREE CHILDREN.  V1 OPERATOR DIDN'T SEE V2 BUT WAS FOLLOWING V2.  WHEN OPERATOR OF V1 SAW V2 IT WAS TOO LATE, SWERED TO AVOID COLLISION AND TUBE STRUCK V2 WHICH CAUSE THE THREE CHILDREN TO STRIKE V2. TWO CHILDREN WHER TAKEN TO SCHOOLCRAFT MEMORIAL HOSPITAL WITH MINOR INJUIRES.  THRIRD CHILD WAS TAKEN TO ST. FRANCIS HOSPITAL WITH MINOR INJURIES.  CITATION ISSUED FOR NO BOATER'S SAFETY CERTIFICATE.