simplified engineering design procedure presented in (1) . 

 Since the earlier report, (1), constitutes an integral part 

 of this study program, the details of these calculations 

 will not be repeated here. 



If we refer to the analysis of (1), a comparison of the 



unfaired- and faired-cable system requirements necessary to 



achieve a 5000-foot depth can be made. In the faired-cable 



case, it is shown that, if the tension at the water surface 



is limited to one-third the breaking strength of the cable, 



the minimtim value of r^ required to reach a depth of 5000 



feet is 42 x 10"^ ■ ,. . Here, d is the diameter of the 



rt 



cable and V, the towing speed. Corresponding to this ratio, 

 the value of ^ is 1.14 x 10* ^ri" • Here, T is the required 

 downforce on the bottom end. The required cable length, Sj^, 

 is 6200 feet, and the horizontal distance from the bottom 

 end of the cable to the tow point is 3500 feet. 



In the unfaired -cable case, as a result of the choice 

 of the hydrodynamic loading functions, the curves do not 

 exhibit a minimtim value for i^ . This may be seen in Figure 

 1, which presents a comparison of the requirements for the 

 faired and unfaired cases. 



In carrying out these calculations, the methods of (4) 

 were employed. The tension in the cable at the water surface 

 was assumed to be one-third the breaking strength of the 



19 



