36 



quite consistently with the Eastern Division radio station at Nahant, 

 Mass., and ships in the off-shore patrol force at distances varying from 

 1,000 to 1,500 miles. Practically all long-distance communication 

 was, of course, carried on during the periods of darkness. 



On April 13, an official message was received from the cutter 

 Mojave at Boston, requesting that the General Greene listen for the 

 transmitter on the Mojave on 4,135 kilocycles, after the evening 

 schedule with Nahant radio, for the purpose of establishing sched- 

 ules. The General Greene to use the T-6 transmitter. The Mojave 

 was informed that although there was no high-frequency receiving 

 equipment aboard the General Greene, an attempt would be made 

 during the next patrol to comply with this request. 



Three radio-receiving coils were constructed for the CGR-30 high- 

 frequency receiver by the chief radioman of the General Greene which 

 enabled this receiver to cover a frequency band from 3,500 to 4,400 

 kilocycles, in addition to its regular receiving range from 2,315 to 

 2,705 kilocycles. Evening schedules with the Mojave were kept for 

 seven days beginning May 3. Very good results were obtained and 

 many words of ice-patrol traffic were handled in this manner. 



The importance of radio time signals on any ice patrol can not be 

 overestimated, as accurate time is one of the factors used in determin- 

 ing the ice-patrol ship's position, which means that they should be 

 received with regularity each day. During June, July, and August, 

 reception of time signals from the navaL radio station at Arhngton, 

 Va., was marred considerably by intense static on both 68 and 113 

 kilocycles. At times this static was so heavy as to make the recep- 

 tion of time signals and weather reports impossible. It was found 

 that during these periods time signals sent by Arlington simultane- 

 ously on 113 and 4,015 kilocycles, could be received consistently on 

 the latter frequency by using the coils constructed for the CGE.-30 

 receiver at an earlier date. This method was therefore employed 

 throughout the remainder of the ice-patrol season with gratifying 

 results. 



On July 4, soon after leaving St. John's, Newfoundland, on the 

 northern oceanographic cruise, it was thought best to make some 

 definite arrangements with Coast Guard Headquarters regarding the 

 transmission of reports should direct communication with Coast 

 Guard stations fail because of the distance of the General Greene 

 from the United States. With this in view permission was obtained 

 to make use of whatever commercial shore stations were available. 

 Therefore, beginning the 15th of July and continuing until the 

 return of the General Greene to St. John's, over one month later, 

 messages to headquarters were transmitted by way of near-by Cana- 

 dian and Danish commercial radio stations. 



