Chryssostomtdts 
Finally answering the comment about the optimization criterion. 
I do not believe that my considerations were limited to an environment 
having a wave height of roughly 8 ft. 
In answer to Dr. Wermter, I recognise that the environment 
description adopted in the present study was rather limiting. What is 
of importance is to recognise that the proposed procedure can accom- 
modate other standard environment descriptions which are consider- 
ed to be more suitable. I believe, however, that in the first iteration 
the environment description must be kept as simple as possible, as 
long as it is realistic, in order to allow the user to investigate the 
large number of alternatives called for by the proposed methodology 
and that the appropriate place to use the exact environment descrip- 
tion is in the second iteration. 
Answering the question about power. The proposed methodolo- 
gy treats the available power as an independent variable and permits 
the user to determine the "'optimum'"' power that one must install ina 
ship operating in the "'actual'' environment taking into account both 
voluntary and non-voluntary speed reductions. 
Answering the question about detailed propeller design. This, 
in the proposed methodology, is treated in a subsequent iteration. In 
the first iteration it is necessary to accept a standard but realistic 
propeller design, in order to be able to examine as early as possible 
the influence of seakeeping considerations in the decision making pro- 
cess. 
DISCUSSION 
Reuven Leopold 
U.S. Navy. Naval Shtp chet AIM Center 
Hyattsville, Maryland, U.S.A 
When I saw the title of the paper, ''SSeakeeping considerations 
in a total design methodology", I was looking forward with great inte- 
rest to the paper itself, which I must admit is rather disappointing. 
There are several reasons for my disappointment. The first is because 
I read with great interest and enthusiasm reference 1 ''A design metho- 
dology for ship and other complex systems" by Professor Chryssosto- 
midis and Professor Mandel in London earlier this year, which I feel 
1622 
