The first in this series of monthly determinations of ice conditions 

 from the Grand Banks to northern Labrador was conducted 21-22 

 September. Monthly ice conditions for Newfoundland-Labrador 

 were also determined by aerial reconnaissance on 21 October, 10 

 November, and 6 December. The October and December Newfound- 

 land-Labrador ice conditions were observed as part of northern ice 

 surveys scheduled and conducted at those times for the main pur- 

 pose of determining the available Grand Banks iceberg supply for 

 1965. The 21-23 October 1964 survey also included the Hudson 

 Strait and Frobisher Bay entrance, the east coast of Baffin Island 

 to Cape Dyer, and the western half of Davis Strait and Baffin Bay 

 north of Cape Dyer. The 6-8 December 1964 survey was conducted 

 from Newfoundland north to Cape Christian, Baffin Island. The 

 above surveys are discussed in detail later in this section. 



PRESEASON 1964 NORTHERN ICE SURVEYS 



The first 1964 preseason northern ice survey was conducted during 

 3-5 December, covering waters of the continental shelf from 

 Newfoundland to Cape Dyer, Baffin Island. This survey was of con- 

 siderable interest as it was a month earlier than the first 1963 presea- 

 son survey and it extended farther north, covering the coastal waters 

 of southeast Baffin Island to Cape Dyer in addition to the Labrador 

 coast and the Hudson Strait entrance. A report by the Canadian 

 Department of Transport that sea ice conditions in the Hudson Strait 

 and southeast Baffin Island coastal region were the worst on record 

 aroused apprehension about the possibility of a heavy iceberg year 

 for the Grand Banks in 1964. The 3-5 December 1963 ice survey in- 

 cluded three ice observation flights. The first flight of 3.9 hours 

 from Argentia to Goose Bay, Labrador, covered the Labrador Cur- 

 rent from northeastern Newfoundland to near Belle Isle, up the 

 Labrador coast and into Goose Bay via Hamilton Inlet. The second 

 flight of 6.9 hours from Goose Bay to Sondrestrom, Greenland and 

 the third flight from Sondrestrom to Argentia covered the Labrador 

 coast to 50-60 miles offshore, the entrance to Hudson Strait and 

 Frobisher Bay, and the Baffin Island coast to 90 miles offshore to 

 67°30' N. thence 40 miles either side of a line from Cape Dyer, Baffin 

 Island to Holsteinsborg, Greenland. Visual effectiveness averaged 

 90 percent overall for the three flights. A total of 532 bergs were 

 counted visually and by radar, distributed as follows : 



Bergs 

 South Of 57° N 10 



57° N. to Cape Chidley 114 



Hudson Strait Entrance 71 



63°30' N. to 65° N 236 



65° N. to 67°30' N 101 



Total 532 



69 



