Vassilopoulos and Mandel 



1.6 

 1.4 

 1.2 

 1.0 



kho 

 0.6 

 0.4 

 0.2 

 0.0 



0.6 



+150 



+ 100 



+ 50 S 

 lij 

 ir 



o 

 -50^ 



-100 



-150 



0.9 



1.2 

 X/L 



1.5 



Fig. 41 - Model E in directly astern seas, pitching 

 non-dimensional amplitude and phase angle vs 

 wavelength to shiplength ratio 



298 



