The GEOSECS instrumefit package includes a conductivity-temperature- 

 depth sensor, bottom proximity pinger, dissolved oxygen probe, 

 nephelometer, and a rosette of 30-liter sampling bottles. 



difficult to obtain since these currents cannot be observed directly at 

 the ocean surface. 



Because sound transmission is the basis for detecting, tracking, 

 and identifying submerged objects, the Navy has played a prominent 

 role in supporting research on the acoustical properties of the marine 

 environment. For example, the results of work on oceanic fronts have 

 outlined the horizontal and vertical structure of both subarctic and 

 subtropical fronts in the Pacific. These findings represent a start 

 toward understanding the effects of oceanic fronts on long-range 



100 



