Kaplan 



180 



60 30 - + 30 60 



/9g. BARGE HEADING (degrees) 



180 



Figo 12, Minimum r.m.s» values of added- dynamic line tension 



(pounds/slug) and vertical load acceleration (feet/second ) 

 for boom-lowered load, as a function of barge heading at 

 indicated sea state 



cases the cable force r.m.s. values are greatest near crosswind, 

 and least for upwind and downwind barge headings. 



All of the results obtained in this study provide useful infor- 

 mation for application to many operations that can be performed at 

 sea, using a moored ship as the base. The major questions con- 

 cerning these results are their degree of validity, as well as the 

 capability of extending the results of related situations such as shallow 

 water operation, different mooring systems, the effects of nonllnearityi 

 etc. Some extensions and /or applications of the present theory have 



1050 



