observed near Notre Dame Bay on 19 May. Tliey had traveled 765 

 miles toward the Grand Banks in 81 days for an average rate of 9.5 

 miles per day under favorable winds. If these were Alpha fragments, 

 their overall average drift rate from Smith Sound to Notre Dame Bay 

 was 8 miles per day and the travel time between these points was less 

 than 8 months. Winds were evaluated slightly favorable for drift 

 toward the Grand Banks of the Alpha fragments and perhaps about 

 normal for the locations and months considered. The Alpha frag- 

 ments were not able to survive to the Grand Banks. 



12. Based on aerial observations, permanent attrition of bergs from 

 December to early April was as follows : 



Bergs south of Oape Chidley 4 December 1963 — 44 percent (11 



percent mortalities — 33 percent strandings) . 

 Bergs between Cape Chidley-Cape Dyer 4 December 1963 — 18 



percent (all strandings). 



13. Several bergs north of Cape Dyer on 5 Decem!ber w^ere a factor 

 in the 1964 Grand Banks ice season beginning in late April. At least 

 100 bergs that drifted south of 48° N. during 1964 were located north 

 of Cape Dyer on 5 December 1963. It is estimated that about 50 ice 

 island fragments counted as bergs south of 48° N. originated from 

 the 16 pieces off Hamilton Inlet 26 Februai-y and may have been in 

 the form of the one Charlie piece while north of Cape Dyer. 



14. An estimated 270 (47 percent) of the 580 bergs estimated south 

 of Cape Dyer in early December drifted south of 48° N. An esti- 

 mated 100 (20 percent) of the 500 bergs estimated between Cape Dyer 

 and Cape Christian in early December drifted south of 48° N. 



15. Bergs north of Cape Chidley on 28 February 1964 were not 

 a factor m the 1964 Grand Banks ice season. Bergs north of 58° N. 

 on 28 February were not a factor until June. Only a couple of these 

 bergs were estimated to drift south of 48° N. 



16. Only one berg north of Belle Isle on 1 June was believed to be 

 a factor in the 1964 Grand Banks ice season. 



17. An estimated 330 (66 percent) bergs of the 500 estimated south 

 of 56° N. on 28 February drifted south of 48° N., 320 doing so prior 

 to 1 May. An estimated 35 (17 percent) of the 210 bergs between 

 56° N.-58° N. on 28 February drifted south of 48° N. all from May 

 through July. An estimated 4 bergs of the 155 located between 58° N. 

 and Cape Chidley on 28 Febmaiy survived to south of 48° N. doing so 

 from June to July. Overall, 41 percent of the bergs estimated south 

 of Cape Chidley on 28 February drifted south of 48° N. 



18. Very few bergs were estimated to enter Hudson Strait and 

 become permanently trapped there during the winter of 1963-64. 



19. Less than 25 bergs were estimated to have been eliminated from 

 the 1964 crop by entering and remaining in Belle Isle Strait. 



74 



