The next northern iceberg survey was conducted 6-8 December 1964 

 from Argentia, Newfoundland to Cape Christian. See figure 65. 

 Three fliglits were made as follows : 



(1) 6 December; Argentia to Sondrestrom, Greenland; 7.7 hours; 

 90 percent visual effectiveness; coverage, east coast of Labrador to 60 

 miles offshore, the entrance to Hudson Strait and Frobisher Bay w^est 

 to 66 W, the east coast of Baffin Island to Cape Dyer, and across Davis 

 Strait to Holsteinsborg, Greenland. 



(2) 7 December; Sondrestrom to Goose Bay, Labrador; 7.9 hours; 

 98 percent visual effectiveness; coverage, east coast of Baffin Island 

 from Cape Dyer to Cape Christian, east of 6 December track from 

 Cape Chidley to Cape Dyer offshore to 85 miles then to Goose Bay. 



(3) 8 December; Goose Bay to Argentia; 2.6 hours; 95 percent 

 visual effectiveness; coverage, Hamilton Inlet, Labrador and north- 

 east coast of Newfoundland to 50 miles offshore. 



The following determinations were made on the basis of the 6-8 

 December survey and other surveys made in the autumn of 1964: 

 1. Berg distribution on 7 December 1964 was as follows : 



Note. — It is estimated that 25 bergs were missed from Cape Dyer to Cape 

 Christian due to incomplete coverage. Coverage was excellent in the remaining 

 areas. 



2. The assumption that bergs are normally a minimum along the 

 Labrador coast and south in November has been strongly fortified by 

 evidence. However, it was surprising to learn that the number of bergs 

 south of Cape Christian on 7 December 1964 (452) was less than the 

 number south of Cape Christian on 23 October 1964 (535) . Deteriora- 

 tion of bergs south of Cape Christian exceeded the resupply from the 

 north and east during this period. It is noted that on 23 October the 

 area beginning about 60 miles south of Cape Christian to the south- 

 ward was entirely free of sea ice. By 7 December, the sea ice limits 

 had expanded to Cape Chidley. Bergs south of Cape Chidley spent 

 the entire period in open water, as did many bergs between Cape 

 Chidley and Cape Dyer as of 23 October. Here is more proof that 

 deterioration of bergs in open water is substantial. The possibility of 

 many bergs entering Hudson Strait or Frobisher Bay between surveys 

 and consequently out of the coverage area of the December survey was 



86 



