Pien and Lee 



be reduced, but the information so obtained would also be more basic 

 and useful. 



Ill - CONCLUSION 



The selection of catamaran hull forms which possess good 

 hydrodynamic characteristics should be the result of the best compro 

 mise among motion, powering, and sea -load considerations. 



In the first part of this work, analytical methods of predict- 

 ing motion and sea -loads of catamarans are presented. In the second 

 part, a hull form design procedure which provides a set of ship lines 

 with good resistance characteristics is presented. 



It is anticipated that the utilization of the methods described 

 in this work will contribute a useful, basic input in the preliminary 

 design of a SWATHS. 



506 



