Again this season, the study showed 

 that MP's melt model is very important as a 

 tool for maintenance of the LAKI . From Table 

 4, 68% of the limit-setters were deleted after 

 reaching 150% melt. Non-detection of ice- 

 bergs during reconnaissance patrols ac- 

 counted for 32% of the deletions, of the ice- 

 bergs that comprised the LAKI. The reader is 

 directed to the IIP Organization and Proce- 

 dures Manual (CIIPINST M5400.1) for the 

 policies pertaining to deletion of icebergs from 

 the model. 



Table 4 

 Deletion Method of LAKI Icebergs 



majority of icebergs, which pass south of 52°N 

 latitude or are detected in the IIP operations 

 area, melt before they ever approach near the 

 LAKI. 



This season's study reinforced a find- 

 ing of the 1995 study, that approximately half 

 of the limit-setting icebergs are detected by 

 IIP reconnaissance. In 1995, 48% of the limit- 

 setting icebergs were initially detected by IIP 

 patrol flights conducting reconnaissance pa- 

 trols near the limits. For the 1996 season, IIP 

 patrols accounted for 61 % (Table 1 ) of the ini- 

 tial sightings of limit-setting icebergs. Most of 

 these detections ocurred near the LAKI, which 

 means these icebergs either make it through 

 the IIP operations area (from 52°N to LAKI) 

 undetected or are created in the region near 

 the LAKI. If the latter is considered, it sug- 

 gests that the splitting of icebergs into "pieces" 

 as they journey south, and especially in the 

 vicinity of the LAKI, is an important process of 

 their deterioration. Regardless of how they 

 get there, the fact that these icebergs are 

 found at the LAKI gives impetus for IIP to re- 

 main vigilant in this region. 



Conclusion 



The results from this work have yielded 

 a better understanding of the contributing sur- 

 veillance sources and the final fates of the 

 limit-setting icebergs. In the 1996 Season, 

 3902 icebergs (including resights) were en- 

 tered in the IIP iceberg drift models, of which 

 1 1 were used to set the LAKI . For compari- 

 son, in the 1995 Season, 7962 icebergs were 

 entered in the IIP iceberg drift model, of which 

 1 44 became limit-setters. Assuming data from 

 these two years are typical, then the great 



41 



