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(Block 10) 



Program Element 61153N 

 Task Area SR 0230101 

 Work Unit 1572-031 



(Block 20 continued) 



the numerical computation of previous work have been implemented; 

 previous calculations for following seas have also been repeated. 

 The pitch motions of SWATH 6D in following seas are now in good 

 agreement with the results of scale model experiments. However, 

 the motion results of SWATH 6A in following seas show large un- 

 explained peak values when the encounter frequency becomes very 

 small. 



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