improve the situation materially^ as the shallower angle at 

 the tow point would reduce the influence of the disturbance. 

 For example, at full scope, the cable angle at the vessel in 

 the prototype system will be about 25 degrees. For this case^ 

 vertical motion of the tow point of as much as 20 feet will 

 result in negligible deformation of the cable catenary unless 

 the disturbance is amplified in passing down the cable. The 

 latter possibility must be investigated. Reduction in speed, 

 when on short scope in heavy seas, may also help in keeping 

 the peak loads within the limits of the strength of the cable. 



Fairing 



The possibility of effecting some reduction in the cost 

 of the" cable fairing by using a single-compound construction 

 is discussed in Appendices I and IV. Results concerning the 

 effect on stability of the stiffness in bending seem plausi- 

 ble, but were not tested^; since an available length of con- 

 ventional;, double-durometer craistruction was used for the 

 sea trial. 



During inhaul of the systan at sea, the fairing crept 

 slightly upward relative to the cable, so that some strain 

 was exerted on the upper side of the hangers, elongating 

 the holes in the fairing on that side of the hangers (Figure 

 10) . To alleviate this condition, the fairing terminations 

 were subsequently designed to hold the fairing with equal 

 strength in both directions. 



35 



