RedactedNarrative: V1 was south of the Palm Valley Bridge approximately a mile and headed southbound towing a wakeboarder.  V1 was travelling approximately 28 MPH and in a straight line.  As the wakeboarder went to cross (not jump) the wake, the edge of his board caught the wake wrong causing him to fall.  The wakeboarder was injured (dislocated knee) as a result of the fall.  EMS was called and picked the injured up at Palm Valley Boat Ramp and transported him to Baptist Beaches Hospital in Jacksonville.;