LIST OF ILLUSTRATIONS 

 Figure Page 



1, Comparison of Requirements for Faired and 

 Unfaired Cable to Reach a Depth of 5000 feet..,. 20 



2, Effect of Towing Speed, U, on Required Down- 

 force, T^, and Cable Diameter, d ...o. 23 



o 



3, Vertical Profile Instrumentation Depressor 27 



4, Computed Variation of Downforce (L ) , Drag (D) , 

 and Downforce-to~Drag Ratio (q = arctan L /D) as 



a Function of Towing Velocity, , 29 



5, Effect of Towing Speed, U, on Depth, y. Cable 

 Length, S, and Horizontal Displacement of 



Towed Body, X, for a Constant Tension at Top..., 32 



6, Effect of Towing Speed, U, on Depth, y. Tension 

 at Top, Ti, and Horizontal Displacement of 



Towed Body, X, for a Cable Length of 1000 feet., 33 



7, Effect of Towing Speed, U, on Depth, y. Tension 

 at Top, Ti, and Horizontal Displacement of 



Towed Body, X, for a Cable Length of 6000 feet,., 35 



9. Double-Armor Cable with Clip-Type Fairing ,38 



10. Armored Cable Sectionalizing Assembly ..«.. 43 



11. Twin load-drum. . , ,,...,.,, , . . 46 



12. Class D, Type D-VA-72, "Caterpuller" 48 



13. Generalized Design of a Cable-Towed Instrumen- 

 tation System .,,..,.. 57 



14. Temperature Profile Instrumentation - Block 

 Diagram 82 



15 . Shipboard Equipment , , 85 



16. Temperature Measuring Gage Package..,,,.. 90 



iii 



