Many elements in the flight deck make fatigue worse. Heat, glare, noise, vibrations, exceptionally dry air and confinement to a seat for hours on end can act synergistically to deepen the stress on a body’s mental and physical reserves. A 1977 study by the Royal Air Force Institute of Aviation Medicine found the combined effect of solar and avionics, particularly in hot weather conditions, will raise temperatures well “in excess of the upper limit for effective physiological ...


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