berg threat to Track C was now remote, northern Track F was ex- 

 pected to be threatened by bergs well into July. An estimated 28 

 bergs crossed 48° N. during June, well below the 64-year June average 

 of 66. 



Sea ice conditions along the northeast Newfoundland coastal areas 

 were worse than average, particularly in Notre Dame Bay. In early 

 June a 40 to 60 mile wide belt of close to open pack ice extended from 

 just north of Funk Island to 51° W. with scattered floes east to 49° W. 

 As southwesterly winds prevailed during mid-June, the pack ice was 

 driven out to sea where deterioration was rapid in the warmer waters. 

 By 20 June the sea ice limits had receded to north of Belle Isle. Belle 

 Isle Strait was believed navigable by 6 June, or about 1 week ahead 

 of schedule, although there were numerous bergs and som.e open pack 

 ice there and in the eastern approaches. By the end of June the sea 

 ice limits receded north of Hamilton Inlet to 55° N. 



JULY 



At the beginning of July a few bergs, mostly medium-sized, were 

 located in or near Track F. Also there was a group of about 20 bergs 

 near 49°20' N., 51° W. in the Labrador Current and approaching 

 Track F. See figure 27, Ice Conditions 1 July 1964. The prevailing 

 winds in the area for July were southwesterly. See figure 15, mean 

 sea level pressure for the period 1-31 July 1964. As the Azores high 

 was located at its usual position for July, summer weather conditions 

 existed over the Grand Banks accompanied by prolonged periods of 

 calms or light winds. The movement of the few bergs threatening 



46° 45" 44* 43' 



Figure 27. — Ice conditions Grand Banlis on 1 July 1964. 

 23 



