12-9] 



SPECIAL DISPLAY DEVICES 



655 



Error Circle 



Attitude Tee 



Fig. 12-35 AI Display Specified for Attack Phase. 



Breakaway Display. After launching, precise interceptor tracking is 

 no longer required, but the radar must remain locked-on until impact to 

 provide illumination and so only moderate turns are possible. In order to 

 preclude the possibility of collision, the interceptor should take violent 

 evasive maneuvers after impact. Danger of collision will be indicated by 

 the display of a breakaway symbol when there is danger of collision, 

 accompanied by a flashing light at the side of the scope. The breakaway 

 symbol could have a number of forms. We shall require it to be a large 

 arrow pointing in the direction in which the interceptor should break away. 



Alternative Solutions. It should be emphasized that other solutions to 

 this display problem could be found. In an actual design study, several 

 solutions might be derived using the general lines of reasoning presented in 

 this example. These then would be evaluated to determine their relative 

 efficiencies as solutions to the display problems. Such evaluations would 

 involve use of data already presented in this chapter and carefully designed 

 experiments which would disclose the specific problems of the application. 



12-9 SPECIAL DISPLAY DEVICES 



New types of phosphors, electron optics, and display tubes are being 

 developed which are improvements over the conventional cathode ray tube 



