Vassilopoulos and Mandel 



1.6 

 1.4 

 1.2 



1.0 



^0.8 



ho 



0.6 

 0.4 

 0.2 

 0.0 



+150 

 + 100 

 + 50 S 



LlI 



o 



-100 

 -150 



0.6 



0.9 



1.2 

 X/L 



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 S 



LlI 

 CC 



^ 

 UJ 

 O 



- 50 ~' 

 * 



-100^ 

 -150 



1.2 

 X/L 



1.8 



Fig. 51 - Model G in directly ahead seas, heaving 

 non-dimensional amplitude and phase angle vs 

 wavelength to shiplength ratio 



308 



