Date 



Years Missing Data 



Years Drifted, 

 # of Days 



1 5 March 



76, 78, 84, 86, 88 



75 - 8 days 

 79 - 9 days 



30 March 



88 



75 - 4 days 



76 - 3 days 



78 - 6 days 



79 - 6 days 

 86 - 3 days 



15 April 



None 



79 - 9 days 



80 - 6 days 



30 April 



79 



None 



15 May 



None 



None 



30 May 



78 



None 



■••.•< 



15 June 



79,80 



None 



30 June 



75, 77, 78 



None 



15 July 



75, 77-80, 86 



None 



30 July 



^ 



75-78,80,81,86 



None 



Tablel 



Data availability for 1975-1995. 'Years data missing' give periods when the IIP Annual Report did not 

 contain data within 9 days of the analysis date. Years drifted give those years when limit setting 

 icebergs were drifted using HP's operational model to bring the available data up to the analysis date. 



62 



