Methods employed by Chesapeake and Ohio Railway Co at Newport News, Va, to facilitate coal loading of ships; system uses 4-channel f-m carrier equipment signals of which are superimposed on power circuits as means of providing communication between towers and shore; how system operates; radio telephone is also used.
Marine coal pier railroad communication
Telegraph Telephone Age
Telegraph and Telephone Age ; n 10
1950
2 pages
Article (Journal)
English
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