4. SUMMARY 



a. Type of System 



(1) Azimuthal. 



(2) Base line length: 3 wave lengths, 



(3) Dependence of relative amplitudes : 



(a) In transmission: the phase and amplitudes of transmission 

 from two radiators must be maintained in order to hold the 

 desired directivity pattern, 



(b) In reception: phase and amplitude measurements are not 

 necessary. The receiver need only cover the proper fre- 

 quency band and perform the standard detection and 

 amplification functions , 



(4) Type of modulation: keyed cw. 



(5) Presentation: 



(a) Aural or visual: as normally used the presentation is aural; 

 several visual dot-dash counting devices have been tried. 



(b) The Larkley Consol Indicator links dots and dashes on a 

 teleprinter tape and provides a reading device for changing 

 the equisignal value on the tape to a dot -dash count. 



(c) The Veedor counter utilizes three counters, one for dot count, 

 one for dashes, one for equisignal divided by two. 



(d) Automatic or manual: manual operation is SOP, 



(e) Continuous or intermittent operation: continuous. 



(f) Time to procure data and plot fix: 4-5 min approximately, 



(6) Ambiguities and how resolved: by RDF or dead-reckoning procedures 



(7) Number of users: unlimited. 



(8) Frequencies utilized: 



(a) Consol: 257kc, 266kc, 285kc, 315kc, and319kc, 



(b) Consolan: 190kc, 192kc, 194kc. 



(9) Bandwidth required: not more than 20 cps. 



42 



artbur ai.ltittlejnr. 



