Federal Radio Commission's order in field of aviation radio is given in parts and discussed; establishment of chain of aircraft radio facilities, each chain or group being designated by color; frequencies 3136, 3142, and 3148 set aside solely for use in aviation service; classification of frequencies.
Permanent radio plan announced
Aviation
Aviation ; 27 , n 13
1929
Aufsatz (Zeitschrift)
Englisch
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