CONCLUSIONS 



observed phase differences are indicative of an implemented 

 system accuracy of 0, 7 n. mi, during the day, 0. 8 n. mi. at 

 night and 1.1 n.mi. during transitions, based on present 

 radiated powers and predictability. 



Omega phase differences on various lines-of- 

 position were measured over ten million square miles during 

 a period of two years. Most data are well explained by pre- 

 sent propagation theory while the additional data measured 

 should serve as a useful basis for extending the theory to 

 arctic and short propagation paths. 



The results continue to indicate that a 24-hour 

 accuracy of about 0.9 n. mi. will be obtained in an imple- 

 mented Omega system. 



The operation was also noteworthy from the stand- 

 points of reliable equipment operation for an extended period 

 and of excellent and mutually beneficial international coop- 

 eration. This Laboratory is especially appreciative of the 

 fine cooperation received from the entire complements of 

 both ships. 



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