the significant range of frequencies. Under these conditions, a 20-knot sea is 

 quite safe, while a 30-knot sea is marginally safe. Of course, in the final 

 analysis the reasonableness of our argument depends on the value of the fric- 

 tion coefficient 3 for the array. We only guessed its value here. Assuming 

 that we have not made a gross overestimate of 3 , we can conclude that the 

 chances for the success of this operation are quite good for wind velocities up 

 to 25 knots. 



If the cable is attached to the end of a boom extended from the side 

 of Cuss I, a rather quiet sea is required for a successful operation. Since 

 Cuss I has a beam of about 50 feet, a boom at least 30 feet long is required. 

 Heaving and rolling can occur in phase, and, as seen from Tables I and II and 

 Figure 4, only in a sea excited by a wind velocity of much less than 20 knots 

 are the chances for the success of the operation acceptable. Indeed, it will 

 take a vessel having much greater stability in rolling than Cuss I to carry this 

 operation successfully in a sea excited by a wind speed of 20 knots. 



28 



artbur B.lUtIc Jnt. 



S-7001-0307 



