Another interesting feature cem be seen in the tension 

 equation (3) which suggests that the tension in the line stops 

 increasing with depth for the depth where ©=0. Since the cable is 

 slopingjthe drag forces resolved elong the cable direction balance 

 the weight forces also resolved along the cable direction and dT/dx 

 becomes zero. In practice it must be possible to reach such a con- 

 dition, SLLthough it is doubtful that the use of constant values for 

 the drag will accurately predict the location of this point. 



In view of the weak cxirrents encountered in this location it is 

 apparent that a single moor will provide adeqtiate stability for 

 most purposes. The calculation can be extended to higher current 

 values. For a current of 0.6 knot the displacement will be about 

 80 feet for the same conditions used in the experiment. This is 

 still a fairly small deviation and covild be reduced through use of 

 greater buoyancy or by use of faired anchor lines or other materials 

 which will give lower cross-sections and drag values. 



292 



