abstract 



Two civilian representatives of the U. S. Navy Electronics 

 Laboratory accompanied the Western Task Group of the 

 U. S. Navy Antarctic Development Project of 1947 to obtain 

 oceanographic data. Data were necessarily collected more 

 or less at random and the areas surveyed were not always 

 critical; even so, much useful information was obtained about 

 regions that heretofore have been little known. This report 

 concerns some of the results as of 31 December 1947. The 

 geological and biological, as well as oceanographic, observa- 

 tions made on Operation HIGHJUMP are discussed. Much of 

 the data are being worked up separately and will be reported 

 elsewhere. 



Oceanographic observations included temperature, salini- 

 ty, and transparency measurements. The temperature data 

 provided information concerning the thermal structure and 

 depth of the surface layers in the antarctic, the sea surface 

 temperatures, the Antarctic Convergence, and internal waves. 

 The temperature and salinity data were used to determine 

 the temperature-salinity relation in the antarctic. The geo- 

 logical observations included data concerning the antarctic 

 sea floor sediments, the sea floor features, and the ice-free 

 areas in Antarctica. The biological observations included 

 data concerning marine growth, natural slicks, and the deep 

 scattering layers, in the Pacific and the Antarctic Oceans. 



