Wai'?. Excitationless Ships Forms 



REFERENCES 



1. Kerr, K.P., "Stability Characteristics of Various Buoy Configurations," in 

 "Transactions of the 1964 Buoy Technology Symposium," Marine Technol- 

 ogy Society 



2. Milgram, J.H., "Studies on Making Wave Measurements in the Open Sea," 

 Block Associates Report, Block Associates, Cambridge, Massachusetts 

 (March 1964) 



3. Ogilvie, T.F., "First and Second Order Forces on a Cylinder Submerged 

 Under a Free Surface," Jour, of Fluid Mech., 16:451-472 (1963) 



4. Kerr, K.P., "Stability Characteristics of Various Buoy Configurations," 

 in "Transactions of the 1964 Buoy Technology Symposium," Marine Tech- 

 nology Society 



0.4 

 0.3 

 02 



0.1 



A EXPERIMENT-MOTORA 8 KOYAMA 



THEORY -MOTOR A 8 KOYAMA 



THEORY -MILGRAM 



2 0.3 4 5 6 



Fig. D6 - Heaving force 

 for sphere type models, 

 T= 3.5a 



REPLY TO DISCUSSION 



Seizo Motora and Takeo Koyama 



TO CAPT. PORTER'S DISCUSSION 



The authors would like to express their warmest thanks for Capt. Porter's 

 kind remarks. It is very interesting and encouraging to see that Capt. Porter's 

 exact solution for bulbous bodies showed quite similar tendency as the authors' 

 rather intuitive observation. 



The authors are most interested in measuring heaving forces of those ship- 

 like forms and in treating three-dimensional problem by strip method using 

 these sections. 



411 



