PREFACE 



Continuing in an uninterrupted manner since 1956, the biennial symposia on naval 

 hydrodynamics convened for its Eighth Symposium, August 24-28. 1970 at Pasadena, 

 California. This conference was jointly sponsored by the Office of Naval Research, the 

 Naval Undersea Research and Development Center, and the California Institute of 

 Technology. 



The technical program in this series is traditionally structured about a limited num- 

 ber of topics of current interest in naval hydrodynamics. In the case of the Eighth 

 Symposium, "Hydrodynamics in the Ocean Environment" was selected as the focal theme 

 not only because of the present widespread research interest and activity in this subject 

 but also in recognition of 1970 as the inaugural year of the "International Decade of 

 Ocean Exploration." This motif for the Eighth Symposium was also aptly reflected in 

 the banquet address to the participants by Rear Admiral O.D. Waters, USN, then Ocean- 

 ographer of the Navy. 



The organization and management of a meeting of this magnitude requires the atten- 

 tion and energy of a large number of people over a long period of time. To Dr. Harold 

 Brown, President of the California Institute of Technology, to Captain Charles Bishop, 

 Commander, Naval Undersea Research and Development Center, and to all the various 

 members of their organizations who contributed in many different ways to the success 

 of the Eighth Symposium, the Office of Naval Research is deeply indebted, and to them 

 we extend our heartfelt gratitude and appreciation for a job well done. It is particularly 

 appropriate, however, to acknowledge the specific roles of Professor Milton S. Plesset and 

 Professor T.Y. Wu of the California Institute of Technology and Dr. J. Hoyt of the Naval 

 Undersea Research and Development Center who as a group carried the lion's share of 

 the responsibility for the detailed planning and day-to-day management of the Eighth 

 Symposium. We take special pleasure in acknowledging the invaluable assistance of Mrs. 

 Barbara Hawk, secretary to Professor Plesset, who in a most gracious and efficient man- 

 ner carried out a multitude of important tasks in support of the Symposium. In addition, 

 Mrs. Hawk, together with Mrs. Alrae Tingley, were responsible for the preparation of the 

 typescript which was used in the publication of these proceedings. Mr. Stanley Doroff of 

 the Office of Naval Research played his usual critical role, participating actively in every 

 aspect of the planning and execution of the arrangements for the Eighth Symposium. 



,/PM/f^-^2 



RALPH D. COOPER 



Director, 



Fluid Dynamics Program 



Office of Naval Research 



m 



