FOREWORD 



In 1958, the Hydrographic Office was assigned the responsibility for 

 the development of an Antisubmarine Warfare Environmental Prediction 

 System (ASWEPS) . This system is a five-year program designed to provide 

 the Fleet with continuing environmental information and predictions in 

 support of antisubmarine warfare operations. 



Of paramount importance in the prosecution of this program is the 

 availability of an oceanographic research vessel instrumented especially 

 for ASWEPS requirements. This report deals with a research experiment 

 conducted aboard the USS SAN PABLO (AGS -30) in the Tongue of the Ocean 

 from 4 March to 20 March 1960. It is narrative in nature, containing a 

 tabulation of the data, as well as generalizations resulting from a 

 cursory examination of the data. 



It is believed that analysis of the data obtained from this experiment 



will contribute significantly toward the development of a prediction 



technique for the thermal structure of the ocean. 



/ 



Rear Admiraiyju. S. Navy 

 Hydrographer 



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