20 depict the flights to Cape Chidley. Figures 18 and 19 depict the 

 census flights of western Baffin Bay. 



The first northern survey to determine the 1966 Grand Banks berg 

 supply was made on 20-22 October 1965. Three flights were required 

 to cover the areas of interest and were : 



1. 20 October; Argentia to Sondrestrom, Greenland; 7.0 hours, 30 

 percent visual effectiveness; 90 percent radar effectiveness; coverage 

 included continental shelf waters from Notre Dame Bay, Newfound- 

 land to Cape Dyer, thence across Davis Strait to Holsteinsborg, 

 Greenland. 



2. 21 October; Sondrestrom, Greenland to Thule, Greenland; 6.9 

 hours; 30 percent visual effectiveness, 90 percent radar effectiveness; 

 coverage included coastal waters of Baffin Island from Cape Dyer to 

 Bylot Island, Devon Island and Ellesmere Island, north to Smith 

 Sound, thence to Melville Bay and Thule, Greenland. 



3. 22 October; Thule, Greenland to Goo.se Bay, Labrador; 6.8 hours; 

 30 percent visual effectiveness ; 90 percent radar effectiveness ; coverage 

 offshore of second day's flight including west half of Baffin Bay and 

 Davis Strait. See figure 18 for track and ice plot. Bergs were dis- 

 tributed as follows : 



Due to the poor visibility encountered during these flights it is esti- 

 mated that the berg count may be greater by as much as 10 percent of 

 that actually observed. The berg sizes were based on actual sightings 

 but due to the numbers present at one time a group size was estimated 

 from which a distribution on size was arrived. The "Unclassified" 

 colunm pertains to radar targets classed as possible bergs. 



On the basis of similar observations in 1964 it is assumed, on the 

 basis of berg group travel times, that the 1966 Grand Banks berg po- 

 tential was mostly located in an area from off Cumberland Sound 

 northward to Devon Island, to Cape York, Greenland and thence south, 

 or in western Baffin Bay. Field ice observed during this flight was 

 sparse and mostly \evy open pack with new ice occurring in the 

 northern areas. The most dense pack was to be found along Baffin 

 Island. 



28 



