■13- 



Underway Obsemratlons 



Precision depth recordings 

 Gravlmeter recordings 

 Magnetometer total field intensity- 

 recordings 

 Bathythe rmograms 

 Seismic reflection 

 Surface water temperature 



Bruce Heezen 

 J. L. Worzel 

 J. R. Heirtzler 



R. Gerard 

 J. I. Ewing 

 M. Ewing 



Station Operations 



Seismic refraction profiles 



Gravity cores 



Hydrographic casts 



Large-volume samples for C-'-^, H^, 



Sr, Cs 

 Microbiological sampling 

 Plankton sampling 



Bottom trawling for biological specimens 

 Sound velocity and transmission 



Measurements 

 Bottom temperatures and temperature 



gradients 

 Bottom dredging for rocks 

 Bottom Photography 



(Charles Drake 

 (J. E. Nafe 

 (j. I. Ewing 

 C. Fray 

 R. Gerard 

 W, Broecker 



P. R. Burkholder 



Alan Be 



Alan Be 



J. I. Ewing 



M. Langseth 



C. Fray 

 M. Ewing 



In Port observations 



Rock collections 



C. L. Drake 



UNIVERSITY OF RHODE ISLAND 



Under Dr, John A. Knauss, the Narragansett Marine Laboratory of the 

 University of Rhode Island is carrying out two three-month studies of 

 the equatorial current circulation in the Indian Ocean aboard the R/V 

 ARGO, whose cruise itinerary has been given above. Planned locations 

 of the sections are shown in Figure 6. 



WOODS HOLE OGEANOGRAPHIC INSTITUTION 



The Woods Hole Oceanographic Institution, under the direction of 

 Dr. Paul Fye, is planning the following cruises to the Indian Ocean. 



