Verhagen 



Taking In mind that in the last case the value of y must be 

 higher than 0,5, due to the shorter wave length, the agreement is 

 very good again. 



>, A 



z 

 o 



< 



> 



O 

 K 



Z 



•^Va/f ' 



in m. sec."^ 



Fig, 17, Relation between surge, sway and wave 

 characteristics 



ACKNOWLEDGEMENT 



The author would like to thank the staff of the Seakeeping 

 Laboratory of the N.S,M,B, for the many fruitful discussions. He is 

 indebted to Mr, Tan Seng Gle who carried out the experimental 

 program. 



978 



i 



