Waterboarding induces panic and suffering by forcing a person to inhale water into the sinuses, pharynx, larynx, trachea, and lungs..
The head is tilted back and water is poured into the upturned mouth or nose. Eventually the subject cannot exhale more air or cough out more water, the lungs are collapsed, and the sinuses and trachea are filled with water. The subject is drowned from the inside, filling with water from the head down. The chest and lungs are kept higher than the head so that coughing draws water up and into the lungs while avoiding total suffocation. "His sufferings must be that of a man who is drowning, but cannot drown."
They have Facts about What It Is and How To Do It. They have Opinions including Firsthand Accounts and Historical Descriptions, along with Is It Torture? and Torture 2.0.
Their main page has this:
Michael Mukasey: We Are Here For You
The confirmation vote for Michael Mukasey, nominee for United States Attorney General, is scheduled for Tuesday, November 6. In his confirmation hearing Judge Mukasey was asked for his opinion on waterboarding as a constitutionally valid technique for interrogation. Mukasey replied, "I don't know what's involved in the technique. ... I think it would be irresponsible of me to discuss particular techniques with which I am not familiar."
Waterboarding.org would like to offer to help the nominee become more familiar with water-based coercive interrogation techniques. Using unclassified sources, news reports, and historical records we are attempting to put together as clear a picture as possible of this technique, its history, its legality, and the scope of its use. We are also attempting to organize a group of doctors, paramedics, lawyers, and volunteers to allow anyone who remains confused or unclear on the details of waterboarding to safely subject themselves to as much of the technique as they are willing to endure.
We look forward to advising, educating, and assisting Michael Mukasey, future candidates, public figures, and anyone else who professes ignorance of our nation's most controversial coercive interrogation technique.
The only question I have left is for the Democrats that vote to confirm him. Are you going to act surprised when Mukasey "can't recall" the answers to any of your questions later on?