Appendix B 



International 



Ice Patrol's 



1990 Drifting 



Buoy 



Program 



Alfred T. Ezman 



INTRODUCTION 



The 1990 iceberg 

 season was the fifteenth con- 

 secutive year that the Interna- 

 tional Ice Patrol (IIP) has used 

 satellite-tracked buoys to mea- 

 sure currents in its operations 

 area in the western North At- 

 lantic Ocean. Buoy trajecto- 

 ries are used to provide near 

 real time current data to the 

 Ice Patrol iceberg drift model. 

 Currents derived from the buoy 



trajectories are used to tem- 

 porarily modify the mean cur- 

 rents in the region through 

 which the buoys drift. Shortly 

 after a buoy departs the re- 

 gion, the current is reverted to 

 its mean value (Summy and 

 Anderson, 1983). 



During the 1990 

 Ice Patrol season the Ice Pa- 

 trol deployed ten buoys (Table 

 B-1). Five ofthese were in the 

 standard configuration de- 



Table B-1. Summary of 1990 Deployments 



Page 49 



