FOREWORD 



Knowledge of the space-time variation of thermal structure parameters 

 is prerequisite to development of prediction techniques for use in the 

 Antisubmarine Warfare Environmental Prediction System (ASWEPS). Since 

 this knowledge can be gained only through analysis of long series of 

 data, historical bathythermograph (BT) observations from U.S. Coast Guard 

 Ocean Station Vessels have been utilized. These observations, supple- 

 mented by high density time series data collected by Naval Oceanographic 

 Office personnel aboard these vessels, form the basis of this report. 

 The Oceanographic Office has assembled these data into the Sonar Experi- 

 mental Research Card (SERC) deck, which is available to the scientific 

 community for research purposes. 



The statistical techniques of this report involve reduction of BT 

 data to punchcard fonnat suitable for thermal structure research. This 

 report describes the environment at Ocean Weather Station ECHO (35N,^t8w) 

 and is the first in a series. Subsequent reports will describe the 

 environment at other Ocean Weather Stations. * 



DENYS W. 



Rear A^iral, U.S. Wavy 



Commander 



U.S. Naval Oceanographic Office 





