the eddy. However, for more 

 subtle features like the striations, 

 digital processing would have 

 provided better definition. 



The study also illustrates the 

 importance of reliable and good 

 navigation. Each of the major 

 navigation systems used (inertial 

 navigation, LORAN C, and System 

 ARGOS) has different reliability, 

 accuracy and availability. The 

 coarse hydrographic sampling 

 scheme was an accommodation to 

 this problem, and even so, match- 

 ing three navigational realizations 

 of a physical feature was often 

 difficult. The future offers a 

 solution in the Global Positioning 

 System, but for the next few years 

 the problem will remain. 



The use of aircraft-borne SLAR, 

 and eventually satellite-bome 

 SAP, in determining ocean 

 circulation near the Grand Banks 

 holds great promise for improving 

 IIP operations. However, the work 

 in interpreting radar imagery of the 

 ocean surface has only started. 

 Experiments such as that de- 

 scribed here must be repeated 

 several times with a broad range 

 of ocean features. Ultimately, the 

 combination of active microwave 

 imagery and air-deployed buoys 

 will permit IIP to gather the 

 required near real-time data. 



Acknowledgements 



The officers and crews of USCGC EVERGREEN (WMEC 295) and CG- 

 1503 and CG-1504 from Coast Guard Air Station Elizabeth City, N. C. 

 enthusiastically supported our research; their efforts are greatly appreci- 

 ated. The authors would also like to express their thanks to Frank Williams. 



The foundation of the data collection and analysis reported here was 

 provided by the Marine Science Technicians of International Ice Patrol. 

 Without their efforts this work could not have been accomplished. They are: 

 MSTCS G. Wright, MST1 K. Pelletier, MST1 M. Barrett, MST2 D. Hutchin- 

 son, MST2 W. Henry, MST3 C. Weiller, MST3 D. Beebe. 



References 



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