Vassilopoulos and Mandel 



1.6 

 1.4 

 1.2 



1.0 



0.6 

 0.4 

 0.2 

 0.0 



0.6 



+150 

 + 100 

 + 50 S 



UJ 



□: 

 ^ 



UJ 



o 



- 50 ~ 

 * 



-100 

 -150 



0.9 



1.2 



1.5 



1.8 



Fig. 55 - Model G in directly astern seas, heaving 

 non-dimensional amplitude and phase angle vs 

 wavelength to shiplength ratio 



312 



