by that time pack ice normally has spread south to Cape Chidley and 

 caught up with most of the berg crop. 



2. The years 1962 and 1963 were light ice years featured by the 

 previous winter weather patterns being unfavorable for ice drift 

 toward the Grand Banks and survival. It was realized that the de- 

 terminations made for the 1962 and 1963 Grand Banks ice season were 

 based on data representative of light years and the 1963 conclusions 

 made some allowance accordingly but apparently not enough. 



3. It was then believed that much of the berg crop normally de- 

 toured into Ktudson Strait entrance en route to the Grand Banks. 



POSTSEASON 1964 NORTHERN ICE SURVEYS 



During the period between the termination of the Grand Banks ice 

 season in late July and the end of 1964, two northern ice surveys from 

 Newfoundland to Baffin Bay and two Grand Banks, Newfoundland- 

 Labrador ice surveys were conducted. The surveys to Baffin Bay 

 were for the main purpose of determining the 1965 Grand Banks ice- 

 berg crop. The Grand Banks, Newfoundland-Labrador surveys were 

 for the main purpose of commencing a series of monthly determina- 

 tions of ice conditions from the Grand Banks to Cape Chidley year 

 around. The two berg crop surveys also included determination of ice 

 conditions along the Labrador coast. The Grand Banks, Newfound- 

 land-Labrador ice conditions determined by flights from Argentia 

 to Cape Chidley and return on 22 September and 10 November are 

 discussed in another section of this bulletin. 



The first northern survey to determine the 1965 Grand Banks berg 

 supply was made 21-23 October 1964. For the first time, ice condi- 

 tions were determined along the entire route of bergs from the north- 

 west Greenland glaciers to the Grand Banks. Three flights were re- 

 quired as follows : 



(1) 21 October; Argentia to Sondrestrom, Greenland; 6.8 hours; 

 95 percent visual effectiveness; coverage included Continental Shelf 

 waters from Notre Dame Bay, Newfoundland to Cape Dyer, thence 

 across Davis Strait to Holsteinsborg, Greeland. 



(2) 22 October; Sondrestrom, Greenland to Thule, Greenland; 7.1 

 hours; 90 percent visual effectiveness; coverage included the coastal 

 waters of Baffin Island from Cape Dyer to Bylot Island, Devon Island, 

 and Ellesmere Island north to Smith Channel, thence to Melville Bay 

 and Thule, Greenland. 



(3) 23 October; Thule, Greenland to Goose Bay, Labrador; 6.8 

 hours; 95 percent visual effectiveness ; coverage offshore of second day's 

 flight including west half of Baffin Bay and Davis Strait. See figure 

 64 for track and ice plot. Bergs were distributed as follows: 



84 



