13 



this broadcast and would have no opportunity to receive any portions 

 missed due to interference during the 15-word-per-minute trans- 

 mission. 



It is thought that radio operators on board vessels which have been 

 in communication with the Ice Patrol from time to time may have 

 ideas on changes that may serve to improve present faciUties and 

 practice. Any suggestion or criticism will be greatly appreciated if 

 forwarded to Commandant, United States Coast Guard Headquarters, 

 Washington, D. C. 



Opportunity is here taken to express sincere thanks to both the 

 Canadian radio stations and the many vessels that cooperated with the 

 Ice Patrol; also for their patience which aided materially in handling 

 an overabundance of traffic. 



The following table shows the schedules that were maintained 

 during the season of 1939. In addition, contact was made with Wash- 

 ington, D. C, about every 2 hours. 



DAILY ICE BROADCASTS TO SHIPPING 



Time (G. M. T.) 



0100 

 1000 

 1300 

 2200 



Frequency (kilocycles) 



175 

 425 

 175 

 425 



DAILY SCHEDULES WITH WASHINGTON (NMH) 



RADIO METEOROGRAPH OBSERVATIONS 



For a number of years the Coast Guard has been cooperating with 

 the United States Weather Bureau Jn submitting weather reports 

 twice daily by radio. These were augmented this year by the addition 

 of a daily radio meteorological observation from both Ice Patrol vessels; 

 one being in the Ice Patrol area and the other in Halifax or enroute 

 thereto. Observations were made from April 1, 1939, to June 30, 1939, 

 inclusive, with a total of 180 ascents, of wliich 170 were successful. 



Prior to departure on the patrol the folloAving Coast Guard per- 

 sonnel received a course of instruction in the use of the equipment 

 at the Naval Air Station, Anacostia, Md.: Lt. William P. Hawley, 

 Ice Observation Officer; Lt. Ned W. Sprow and chief radioman Ellis g! 

 Holden from the Chelan; and Lt. (j. g.) Loren E. Brunner and chief 

 radioman Carl V. Hartman from the Champlain. 



The type of meteorograph used was developed by Messrs. Dimond 

 and Hinmon of the United States Bureau of Standards. The trans- 



