RedactedNarrative: VESSEL #1 WAS TRAVELING NORTHWEST AT APPROXIMATELY 20 MPH, TOWING A TUBE WITH THREE CHILDREN ON IT.  VESSEL #1 TURNED RIGHT CAUSING THE TUBE TO SWING OUT AND CAPSIZE.  THE THREE CHILDREN WERE EJECTED FROM THE TUBE WHEN IT CAPSIZED.  THE VICTIM IMPACTED THE WATER RESULTING IN THE DESCRIBED INJURY (BROKEN HUMOROUS ARM BONE).