height anomalies and contain no wind-current contamination. To be used in 

 drift forecasting they must be combined vectorial ly with a wind current 

 calculated for the specific time and area of interest. A method for 

 calculating a local wind current can be found in Oceanographic Unit Technical 

 Report 78-2. 



U.S. Coast Guard Oceanographic Unit, Building 159-E Navy Yard Annex, 

 Washington, D.C. 20593 



