RedactedNarrative: Operator advised while pulling tube down river with his daughter and her friend on the tube, he started going around a bend when a large vessel heading up river made a wide turn.  Operator stated that he pulled back on the throttle to avoid the larger vessel and the tube headed toward  a piling.  His daughter let go of tube and her friend did not.  Her friend struck the piling.  She was taken to Gulfport Memorial Hospital and suffered three broken Ribs, a lung contusion and fractured pelvis.