Attachment 1 



Major Changes in IIP Technology 



Milestone 



Potential Effect 



1960: Use of hand vector addition routine to Procedure allowed for more accurate limit 

 predict iceberg drift. production and allowed for better resighting of 



icebergs. 



1962: Introduction of HC-130B as IIP recon Provided for a longer range aircraft to cover 

 aircraft. Last year for use of R5D. more area per flight. 



1964: Introduction of a manual iceberg dete- 

 rioration method based on size and sea sur- 

 face temperature/ 



Method provided a means of removing ice- 

 bergs from plot after they were predicted to 

 have melted. 



1970-73: IIP base of operations moved from Longer transit flights reduced available flight 

 Argentia to Summerside, PEL Would RON in time to be dedicated to reconnaissance. 

 St. Johns if forecast good. 



1971: Eliminated request for SST/Wx in ice Reduced available data as input to FNOC. 

 bulletins. Removed a measurement of traffic in IIP op- 



erations area. 



1 971 : Began use of computerized vector addi- 

 tion model. Apparently already using a manual 

 deterioration routine. 



1973: Operational use of Inertial Navigation 

 System (INS) on the IIP Aircraft 



1974: IIP base of operations moved to St. 

 Johns. 



Allowed more icebergs than just limit setters to 

 be drifted. Removed errors associated with 

 hand methods. Better capability to resight 

 icebergs. 



Greatly improved position accuracy of patrols 

 and sighting reports. 



Weather at airport (fog) kept aircraft on ground 

 even if on scene weather good. Greatly re- 

 duced transit times to on scene. 



1976: First satellite tracked drifting buoy de- 

 ployment. 



1979: Introduction of IBERG model. 



Provided first real time current data vs dy- 

 namic height sections as data for input to drift 

 model. 



Introduction was transparent to watchstander. 

 Still had computer cards to deal with, model 

 ran on CDC 3300. New model improved drift 

 prediction and therefore resighting capability. 



1981 : Introduction of HC-130H models. 



Provided for longerflights (1 800 vs 1 500 mile). 

 Increased area covered in single flight. 



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