182 BELL SYSTEM TECHNICAL JOURNAL 



Radio Linked with Transcontinental Line and 

 Catalina Island 



The ship-to-shore radio link was on several occasions connected 

 with very long distance circuits in order to demonstrate the extreme 

 conditions under which combined radio and wire operation are pos- 

 sible. 



Perhaps the most interesting case is that in which the ship was 

 linked up with the transcontinental telephone line and connected thru 

 to Catalina Island in the Pacific thus bringing together the two 

 oceans. The circuit arrangements for one of these demonstrations 

 are given schematically in Fig. 24. Both the Deal Beach and Green 



TRANSCONTINENTAL LINE WITH RADIO EXTENSIONS 



Fig. 24 



Harbor shore stations were used, since it was desired to reach the 

 ship anywhere on her course from Boston to the Delaware capes. 

 The demonstration was, therefore, also an example of connecting 

 the ship into the land telephone system thru either of two shore 

 stations. As a matter of fact, at one time the vessel could be reached 

 thru both stations. It happened that the vessel was coming up the 

 coast. The night before the demonstration the ship was communi- 

 cated with thru the Deal Beach station and connected thru to Catalina 

 Island for a rehearsal. For the demonstration of the following morn- 

 ing, connection was made thru Green Harbor. During both the 

 rehearsal and the demonstration the operator on the vessel talked 

 successfully, altho with some difficulty, with the Catalina Island 

 operator, while New York listened in. This demonstration was 



