In an effort to reduce the problem of position ambiguities, new trans- 

 mitting equipment will be installed by early 1965. ITiis equipment will be capa- 

 ble of generating three frequencies, 10.2, 12.75, and 13.6 kc, sequentially, as 

 indicated in Table IV-7. New receivers using microelectronic circuitry will 

 simultaneously track two of these frequencies and continuously indicate fine lines 

 of position on 10.2 kc and coarse lines of position on the (13.6-10.2) difference 

 frequency. The fine lane widths will be 8 nautical miles as before, but a new 

 coarse lane width of 24 nautical miles will now be available to help reduce posi- 

 tion ambiguity problems . Tlie new receiver will weigh approximately 75 pounds 

 and require about 1 .5 cubic feet of space. Later versions of the receiver will 

 also track the third frequency being generated and yield a third coarse lane width 

 of 96 nautical miles. 



TABLE IV-7 



OMEGA SIGNAL FORMAT 



Transmission 

 Interval 



Station 



0.9 



1.0 



1.1 



1.2 



1.1 



0.9 



1.2 



1.0 



0.9 



10.2 



13.6 



12.75 



fl 













f2 



10.2 



13.6 



12.75 



f2 













f3 



10.3 



13.6 



12.75 



13 













f4 



10.2 



13.6 



12.75 



14 













f5 



10.2 



13.6 



12.75 



f5 













f6 



10.2 



17 



13.6 

 10.2 



12.75 

 13.6 



16 

 12.75 



12.75 













18 



10.2 



13.6 



0.2 sec 



82 



Arthur ai.K.ittlc3nr. 



