the need for temperature measurements in tlE vertical profile, 

 as the thermal structure of the ocean is of direct and con- 

 tinuing interest in nearly every branch of oceanography » 



The major result of this work consists of the conceptual 

 design and specification for a cable-towed oceanographic 

 instrument system suitable for simultaneously positioning 

 measuring devices at discrete depth intervals to 5000 feet. 



The requirements and pertinent design criteria are contained 

 in a general description of the development of this system. 

 It should be noted that, although directed toward temperature 

 measurements, the design is sufficiently flexible to accommo- 

 date any measurement for which suitably miniaturized in situ 

 measurement devices exist. The volume of the instr\iment 

 containers and the spacing along the tow wire can be varied 

 to accommodate special requirements. 



Feasibility of the major concepts has been demonstrated 

 by carrying out necessary preliminary design. Certain criti- 

 cal components have been breadboarded and subjected to suffi- 

 cient test to demonstrate validity. Details are reported 

 in the appropriate sections of the report. 



Finally, those problems which have not been completely 

 resolved are discussed, and a recommended program for future 

 action is given. 



6 



