1981 : Introduction of TOD data current up- 

 date scheme. 



Allowed near real time current data as drift 

 model input. Improved drift prediction. Better 

 resight capability. 



1983: Introduction of APS-135 SLAR. 



1983: IIP base of operations moved to Gan- 

 der. Aircraft now deployed once every two 

 weeks versus a continuous presence in New- 

 foundland. 



1983: Last use of HC-130B as visual recon 

 aircraft. 



The biggest effect on data collection since the 

 introduction of aerial reconnaissance in 1945. 

 Provides an all weather detection capability 

 but target discrimination (iceberg from small 

 vessel) is not perfect. Early years (83-85) 

 probably had many fishing vessels reported 

 as icebergs. First two years of use legitimate 

 extreme seasons which further helped add to 

 the target discrimination problem. 



Move to Gander little effect. Since able to use 

 SLAR in all weather, approx. same number of 

 flights completed during one week deploy- 

 ment as during a two week deployment await- 

 ing good visual on-scene weather. 



SLAR now the primary reconnaissance tool. 



1983: Began using computerized iceberg Provided ability to model melt of all icebergs 

 deterioration model. not just limit setters. 



1987: Introduction of HU-25B and APS-131 Provided another platform. 131 SLAR not as 

 SLAR. good as 1 35 due to antenna length. Reduced 



range of HU-25 will not allow use of aircraft 

 during times limits expanded. 



1 988: IIP base of operations moved backto St. Effect minimal on data collection. Hangeravail- 

 Johns. able for aircraft maintenance. 



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