"Under the old system, pilots routinely avoid liquids before taking off to prevent the unmentionable. But dehydration can make them more susceptible to the G-forces typically seen in fighter aircraft, Harvie said.
When nature's call becomes too pressing to ignore, a pilot has to fly and unbuckle the harness at the same time -- while using both hands to maneuver around in a seat to which he or she is virtually molded.
The aerobatic maneuver is even harder for female pilots.
On long or cold-weather flights, the amount of gear and clothing made the maneuver nearly impossible, and pilots would sometimes have no choice but to relieve themselves in their flight suits.
In the AMXD, a cup for a man and a pad for a woman is strategically placed before the pilot dons a flight suit.
An instructional DVD tells pilots: "When the time comes to urinate, unzip the flight suit, remove the hose.... The control unit will pump the urine from the cup to the collection bag, where it will be chemically gelled."
Pilots are free to think about other business."
Because I know you were wondering about that.