Uvice daily at 0048 and 1248 Greenwich Mean Time commencing with 

 the 0048 GMT broadcast on 24 February and termmating \dth the 

 0048 GMT broadcast on 28 June. Each bulletin was transmitted 

 simultaneous!}- on 155, 5320 and 8502 kilocj^cles with an output power 

 of 2 kilowatts following a preluninary announcement on 500 kc/s. 

 In addition to the plain language bulletin, ice charts were transmitted 

 daily at 1330 GMT by facsimile on 10287.5 kc/s with a drum speed 

 of 60 r.p.m. from 18 April to 28 June. 



All broadcasts included a statement as to the method of ice observa- 

 tion bemg used and a request that ships report all ice sighted and report 

 sea water temperature, position, course, speed, visibility and surface 

 weather every 4 hours when between the latitudes of 39° X. and 

 49° X. and longitudes 42° W. and 60° W. The significance of the ice 

 reports is obvious, but the miportance of the other information is not 

 readily apparent. The sea temperature reports are used to construct 

 isotherm charts which play an hnportant role in the evaluation of 

 berg reports, prediction of berg drifts and estimation of the rate of ice 

 deterioration. The charts prepared from these reports are included 

 as figures 1 tlu'ough 9. The position, course and speed is plotted to 

 indicate the density of shippmg and for use in issuing a special warning, 

 should a vessel or vessels appear to be standing into danger. The 

 visibility and weatlier reports are used in determmmg the feasibility 

 of making an ice observation flight in a given area. The response to 

 the request for information, while not complete, was gratifymg. 



Merchant vessels handled traffic with X^IK by transmitting on their 

 assigned frequency and receiving on 427, 6477.5, 8734, or 12718.5 

 kc/s as appropriate. 



International Ice Patrol operated a branch teletype station from 

 the naval teletype relay at Argentia. This facility was used for the 

 exchange of information with the U.S. Xavy Hydrographic Office, the 

 Canadian Department of Transport Ice Information Office at Halifax, 

 and other interested agencies. 



Dming the 1961 season, Ice Patrol communication facilities handled 

 a total of 18,340 radio messages and 26,143 landhne messages. The 

 statistics concerning ship reports is given below: 



Xumber of ice reports received from vessels 928 



Xuniber of vessels making ice reports 234 



Xumber of sea surface temperature reports 8, 342 



Xumber of vessels making sea temperature reports 528 



Xumber of requests for special ice reports 162 



Total number of vessels worked (not including relays) 579 



Xote: Consideration of the above figures and the total number of reporting 

 vessels in the following table, may lead to the conclusion that an error exists. 

 This is not the case. Some vessels made no ice reports, some made no sea tempera- 

 ture reports, some reported both and some requested information but made no 

 reports. 



