Wave Forces on a Restratned Shtp in Head-Sea Waves 
DISCUSSION 
Michel Huther 
Bureau Verttas 
Parts, France 
I have been very interested by the presentation of the author, 
and I should be very pleased to know his opinion about the limitations 
and possible extensions of the method. I am interested to know the 
order of magnitude it is possible to use for the slenderness parameter. 
Also, have calculations been done with other section shapes as rec- 
tangular, for example, shapes more similar to the nowaday midship 
sections than the cylinder ? 
The author writes that linear superposition can be used. I 
agree with this point of view for longitudinal motion such as pitching 
and heaving, but I should be pleased to know the author's opinion in 
the case of transverse motions such as rolling, where large ampli- 
tudes are to be considered. 
DISCUSSION 
Cheung-Hun C. Kim 
Stevens Institute of Technology 
Hoboken, New-Jersey, U.S.A. 
Dr. Faltinsen proposes a method for improving the present 
strip method of evaluating the wave-exciting forces. His method is 
based on the slender body assumption and the comparison was made 
with the corresponding results of calculations based on the Froude- 
Krylov hypothesis. I would like to know why the comparison was not 
made with the corresponding results of calculations based on the strip- 
wise diffraction theory. 
1841 
