RedactedNarrative: OPERATOR CRUISING APPROXIMATELY 30 KNOTS WHEN HE ENCOUNTERED A LARGE WAKE.  UPON HITTING THE WAKE, THE BOW OF HIS VESSEL RAISED SUDDENLY CAUSING THE VICTIM TO BE THROWN FROM HER SEAT.  AS THE VICTIM CAME DOWN, SHE STRUCK HER BACK AGAINST THE SEAT CAUSING SEVERE PAIN IN THE LOWER BACK AREA. OPERATOR RETURNED TO PORT AND CALLED 911.