646 



DISPLAY SYSTEM DESIGN PROBLEMS 



1.2 



LO 



>; 0.9 



0.8 



0.7 



0.6 



Near Acuity (Tested at 13 in) 

 Far Acuity (Tested at 26 ft) 



o Seated Position 

 n Supine Position 



0.835 



1.00 



1.11 -^ 



1.25 



1.43 



1.67 



012345678 

 ACCELERATION LEVEL (G units) 



Fig. 12-27 Mean of Binocular Acuity as a Function of Acceleration Level and 

 Body Position. 



10 20 30 40 50 60 70 

 PER CENT OXYGEN 



90 100 



Fig. 12-28 Per Cent Oxygen as a Function of Altitude Required to Maintait 

 Normal Oxygen Tension in the Lungs. 



