ABSTRACT 



During late March and April 1961, the USCGC EASTWIND 

 (WAGB-279) occupied 30 oceanographic stations in the Indian 

 Ocean. Three sections were made, one running from off Cape 

 Leeuwin, Australia west as far as 78° E. longitude, a second 

 continuing north from this point to 4° N. latitude, and the third 

 which continued west to just south of Socotra Island. 



Measurements v/ere made of temperature, salinity, and dis- 

 solved oxygen; and from these data density, sound velocity, 

 and percentage of saturation of dissolved oxygen were de- 

 rived. Transparency was determined by Secchi disc, and the 

 Deep Scattering Layer was observed. Continuous recording of 

 bottom depths by echo sounder was carried out through a 

 region where few soundings had hitherto been reported. 



Northward reaching tongues of Antarctic Intermediate water 

 are shown on the southern profile and on the south-north 

 profile along the 78° E. meridian. In mid-Indian Ocean, these 

 masses push up toward the surface causing a divergence 

 which is apparent in the salinity and dissolved oxygen profiles. 

 Also delineated are high salinity waters with very low oxygen 



^^^ " " ■ — "^ ' ^ed Seas. The 



1 Ocean and re- 

 pattern to that 



