From a wince-inducing article in Salon:

The documents also lay out, in chilling detail, exactly what should occur in each two-hour waterboarding “session.” Interrogators were instructed to start pouring water right after a detainee exhaled, to ensure he inhaled water, not air, in his next breath. They could use their hands to “dam the runoff” and prevent water from spilling out of a detainee’s mouth. They were allowed six separate 40-second “applications” of liquid in each two-hour session – and could dump water over a detainee’s nose and mouth for a total of 12 minutes a day. Finally, to keep detainees alive even if they inhaled their own vomit during a session – a not-uncommon side effect of waterboarding – the prisoners were kept on a liquid diet. The agency recommended Ensure Plus.

The article details the use of saline solution to reduce the possibility of death from dangerously low sodium levels, a specially designed gurney for tilting the head at the optimum angle and quickly uprighting the victim in case he stopped breathing, and doctors assisting by monitoring blood pressure to allow interrogators to bring the victim close to the line of death.  And more.

Budenovka bow:  The Morning News.