58 



An unusually heavy amount of traffic was handled during the 

 patrol. It is estimated that approximately 250,000 words were 

 sent and received, and the transmitters were in continuous operation 

 82 per cent of the total time of the patrol. 



The following is a resume of the outstanding messages handled 

 during this cruise: 



Requests for water temperature reports transmitted, 80. 

 Water temperature reports received, 1,387. 

 Radio compass bearings, 20. 



Requests for ice information received and transmitted, 110. 

 Requests for special information received from vessels and answers trans- 

 mitted, 60. 



Messages for passing shipping transmitted, 27. 



Messages in French, German, Italian, and Scandinavian transmitted, 19. 



Special broadcasts transmitted, 11. 



SOS received, 1. 



All regular broadcasts transmitted. 



All United States weather reports received. 



All Halifax, Cape Race and Belle Isle weather reports received. 



All press reports except one received. 



On June 9, 11, and 19, tests were made with NKF (Navy Experi- 

 mental and Research Laboratory, Bellevue, D. C), and with NIDK 

 (Tampa), transmitting on 117 meters. It is not known whether 

 NKF copied or not. NKF was copied every night on 71 meters, the 

 signals being very loud and clear at all times; the adverse atmos*- 

 pheric conditions seeming not to affect the signal strength. No 

 daytime tests were made, but it is believed that the signals could 

 be read just as well during daylight. 



After the NKF tests the transmitter was tuned to 80 meters and 

 station 3BMV (Philadelphia, Pa.) was worked on two occasions, 

 transmitting four messages. The signals were reported loud and 

 clear. LAC (Liverpool, Nova Scotia) on 80 meters was also worked. 

 Amateur stations in all parts of the United States were copied during 

 the patrol and several English amateur stations were heard, one 

 coming in particularly loud on 50 meters; this was G5DH (Dollis 

 Hill, London), a radio experimental station. The Reinarts short- 

 wave receiver, with no amplification, was used on the above tests. 

 This receiver proved very satisfactory for short-wave reception. 



CRUISE, JUNE 24-JULY 9, "TAMPA" 



Two-Jcilowatt tube transmitter. — One of the power amplifiers, a 1-kilo- 

 watt tube, heated up slightly more than the other one, due, probably, 

 to a defective parasitic plate choke coil. This did not interfere with 

 the schedules or reduce the working efficiency materially. All the 

 official traffic was routed through NBD, via the Modoc at Halifax, 

 except one message which was sent via WCC, Chatham, Mass. 



