of May and June were not applicable to this group. The following 

 numerical values were assigned each classification to facilitate deter- 

 mination of an overall classification for each year: VF = 3, F==2, 

 SF=1, N = 0, SU=-1, U=-2, VU=-3. For the first group, 

 double weight was assigned the December-April grades, and for the 

 second group, double weight was assigned the January-June grades. 

 Months prior to November were not considered for reasons previ- 

 ously discussed. For the first half of the crop, the November classifi- 

 cation was assigned only half weight due to micertainties involved. 

 For example, very favorable winds might result in many bergs moving 

 south faster than the sea ice can overtake them, thus causing con- 

 siderably greater deterioration than normal. November and December 

 classifications for the second half of the crop were assigned half weight, 

 as, during this period, this group is believed to be located north of 

 Cape Dyer and it is difficult to estimate the effect of winds there. For 

 example, easterly winds during this period might result in driving 

 many bergs from the glacier areas near Disko Bay and Upemavik 

 into the Baffinland Current, but might also result in driving aground 

 the supply already in the Current from Cape Dyer to Bylot Island. 

 Whether the overall effect is favorable or unfavorable on the Grand 

 Banks berg crop is difficult to assess. A study of table III reveals 

 the following information : 



1. For the years 1957-64, the average estimated number of bergs 

 south of 48° N. is 314 compared to a 65-year average since 1900 of 

 381. 



2. Wind conditions were favorable for berg drift towards the 

 Grand Banks for 4 years, unfavorable for 3 years, and neutral for 1 

 year. 



3. The highest classification was assigned to 1957, which was the 

 most severe iceberg year for the years studied. The 2 years receiving 

 the next highest classification, 1959 and 1964, were the next two 

 heaviest ice seasons respectively. The lowest assigned classification 

 was SU for the 1958 and 1963 years, both of which had extremely 

 light iceberg seasons. 



4. The years assigned unfavorable or neutral classification, were 

 all below normal iceberg years. The years assigned favorable classi- 

 fication were normal or above normal. The one exception was 1960, 

 which was classified slightly favorable and which was a little below 

 normal iceberg year. 



5. If a classification was assigned for each season only through the 

 month of February, there would naturally be some differences from 

 the classifications assigned the whole period, that is through June. 

 However, 1957 would still be classified as the most favorable year of 

 the 8 for berg drift toward the Grand Banks, and 2 of the other 3 

 favorable years would still be classified favorable. However, 3 other 



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