FOREWORD 

 In the mid-1950's, the Hydrographic Office--now the Oceanographic 

 Of f ice--initLated a program for conducting geomagnetic measurements 

 at sea. A major part of this program involves conducting total 

 magnetic intensity surveys aboard "ships of opportunity" while these 

 ships are engaged in some primary tactical or logistics mission. 

 This report presents geomagnetic and bathymetric data from such a 

 survey. Much data of this type will be required for an accurate 

 interpretation of the geologic and structural character of the ocean 

 basins. This report is presented to help advance an understanding of 

 these vast areas. 



DEl/YS W. KNOLL 



Rear Admiral, U. S, Navy 



Commander 



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iLT) 



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