What difference was found between waterboarding and regular reunabout .
According to the DOJ memo , the IG Report observed that the CIA 's Office of Medical Services ( OMS ) stated that " the experience of the SERE psychologist / interrogators on the waterboard was probably misrepresented at the time , as the SERE waterboard experience is so different from the subsequent Agency usage as to make it almost irrelevant " and that " onsequently , according to OMS , there was no a priori reason to believe that applying the waterboard with the frequency and intensity with which it was used by the psychologist / interrogators was either efficacious or medically safe . "