RedactedNarrative: Operator of vessel was towing his daughter (victim) along with five others on a tube.  He started to turn vessel around when victim fell off with two other people.  Victim was heard screaming in the water.  Operator picked her up and towed her back to the dock on the tube at slow-no-wake speed.  During the interview, operator advised he was only going 20-25 mph and believes a large wake sent victim off the tube.  Witness stated she "twisted weird" in the air before landing in the water.  No other injuries were reported.