Vassilopoulos and Mandel 



0.6 



0.9 



1.2 

 X/L 



+150 

 + 100 

 + 50 S 



Ixl 

 IE 



S 



Q 



- 50 

 -100 

 -150 



1.8 



1.6 

 1.4 

 1.2 

 1.0 

 0.8 

 0.6 

 0.4 

 0.2 

 0.0 



0.6 



0.9 



+150 

 + 100 

 + 50 

 

 - 50 

 -100 ' 

 -150 



1.2 

 X/L 



1.5 



Fig. 11 - Model B in directly ahead seas, heaving 

 non-dimensional anaplitude and phase angle vs 

 wavelength to shiplength ratio 



268 



