(nautical milas) 



DECCA PERIOD 



CURVE 1 



A 



B 



C 



D 



E 



WINTER NIGHT 



SUMMER NIGHT 



DUSK 



HALF LIGHT 



FULL DAYLIGHT 



1 1/2 



1 

 1/2 

 1/4 



<1/4 



3 

 2 



1 



1/2 

 1/4 



X 

 4 



2 

 1 

 1/2 



X 

 X 

 4 

 2 

 1 



X 

 X 

 X 

 4 

 2 



FIGURE IV -7 



ERROR CONTOURS FOR DECCA NAVIGATOR 



55 



artbttr 2l.1ttttlf.Ilnr. 



