juns, for in this intense cold there is great risk of all congealing and Machinery "becoming unworkable, Fortress has so complex a panel of instruments and so many controls that no brain can manage them in flight. "The captain and second pilot must work together.
'When the time comes for bombing, the' observer bomb-aimer takes con trol of the aircraft as he starts to operate the bombsights. The whole crew must have as much training and skill as the crew of a submarine and must learn (0 work under as Unnatural conditions.
Their lot is much like that of men who go under the sea, Like deep-sea" divers when they rise too Quickly to the surface, crews above 30,000 feet run the risk that bubbles of nitrogen In the body may expand {oe, aulekly and cause serious even fatal harm,
Text read from the printed page and cleaned; old type leaves the occasional error.