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BELL SYSTEM TECHNICAL JOURNAL 



power from the ship as from the shore. The actual power radiated by 

 the Leviathan s transmitter is of the order of 500 watts. The shore 

 receiver is of the type used on the transatlantic radio telephone circuits, 

 working with a directive antenna. The arrangement provides a fairly 

 well proportioned system, the channels being substantially equally 

 effective in the two directions. 



The Shore System 



The general setup of the system is illustrated in Fig. Z. The coastal 

 stations, sending and receiving, are located about 60 miles south of 

 New York on the New Jersey shore, at Ocean Gate and Forked River. 

 The course followed by the transatlantic ships is indicated on the map 

 of Fig. 4. The directional bearing of this course and the directivity 



3200 



1.0 .6 .2 

 75 

 VOLTAGE 

 AMPLITUDE 



70 



65 



60 55 50 45 40 35 30 25 20 15 10 



DEGREES — LONGITUDE WEST OF GREENWICH 



Fig. 5 — Directional bearings. 



characteristic of the New Jersey shore station antennas are illustrated 

 in Fig. 5. It will be observed that the breadth of the transmitted 

 beam is adequate to take care of the variation of the directional bearing 

 of the course. For steamship routes other than the transatlantic, as 

 for example the coastal route to the South, other antenna arrangements 

 will be required. 



In general, the whole coastal station, including the transmitting and 

 receiving units, taken together with the wire line connections and con- 

 trol position in New York, is similar to one end of a transatlantic point- 

 to-point circuit. The transatlantic facilities have been described in 

 previous papers '^ and reference should l)e made to them for more detail 

 than is given below. The transmitting set has been adapted to cover 



^ Papers on Transatlantic Telephone Service by Messrs. Miller, Bown, Oswald, 

 and Cowan, presented at Winter Convention of the A. I. E. E., New York, N. Y., 

 January 1930. Papers by Messrs. Bown and Oswald, B. S. T. J., Apr. 1930. 



