by which IIP removes an Iceberg from DMPS. 



1. The iceberg deterioration model 

 predicted the iceberg has melted 

 (Anderson, 1983). 



2. The area around the predicted po- 

 sition of the iceberg has been thor- 

 oughly searched either through vi- 

 sual or double radar coverage. 



Discussion 



During the 1997 season, 178 icebergs 

 determined the LAKI. Table 1 lists the sources 

 of the limit setting icebergs when they were 

 initially sighted, or first entered into the ice- 

 berg drift model, and when they were last 

 sighted in the area of the LAKI. As in the pre- 

 vious season (Tuxhorn and Krein, 1996), the 

 table shows that IIP reconnaissance was the 

 primary contributor of icebergs that eventu- 



Table 1 

 Sources of LAKI Icebergs 



ally established the LAKI and the major sight- 

 ing source of the icebergs prior to melting 

 completely and removal from the model. 



Table 2 shows the initial sighting sources for 

 the three categories of icebergs: western, 

 southern and eastern limit setters. Examina- 



tion of the numbers reveals that IIP provided 

 the largest number of iceberg reports on all 

 three sides of the LAKI. Ships reported limit 

 setting icebergs along the east, south and 

 west regions. Iceberg reports from Cana- 

 dian AES (GCFR), Other Air Recon (GPCD), 



Table 2 

 Initial Iceberg Sighting Sources With 

 Respect to LAKI Region 



Sighting So urce 



Coast Guard (IIP) 



Ote Air Recon (GPCD) 



Canadian AES (GCFR) 



Ships 



BAPS 



National Ice Center (NIC) 



Other 



LAKI Icebergs 



Combined I 

 West South East Count 



45 

 6 

 

 11 

 

 3 

 



24 

 24 

 3 

 10 

 13 

 13 

 4 



77 

 35 

 4 



29 

 13 

 16 

 4 

 178 



and BAPS and Other Sources were concen- 

 trated along the eastern limits. 



The size distribution of the limit setting ice- 

 bergs, as reported by the final sighting source, 

 is displayed in Table 3. A third of the sightings 

 were reported as 'general sized icebergs", 

 which is the unspecified size used for most 



Table 3 

 Size Distribution of LAKI Icebergs 



Size Category 



Growler 



Small 



Medium 



Large 



Very Large 



General 



% of Total 

 8 



ia 



25 

 17 



5 

 33 



TI 



43 



