RedactedNarrative: Operator of vessel #1 was cruising the lake in and around where there were swimmers.  Witnesses stated that he seemed to be heading straight at the victim on vessel #2 (inflatable pizza tube) and hit him.  Operator1 did not have a boater safety certificate and claimed that he did not know that he needed to have one.  He received a citation for failing to give way to non-motorized vessel.  The victim was injured and taken to the hospital for treatment of several facial fractures and stitches on his right elbow.  He was released from the hospital.  It is unknown if the participants were wearing life jackets.