physiological factors

not exceed 10 degrees and view each sector at least 1 second. use peripheral vision by scanning small sectors and utilizing off-center viewing. be 30 degrees and view each sector for at least 3 seconds.

clear days. hazy days. cloudy nights.

slowing the breathing rate, breathing into a bag, or talking aloud. increasing the breathing rate in order to increase lung ventilation. closely monitoring the flight instruments to control the airplane.