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Seakeeping Symposium To Be Held Oct. 18-19 At Webb Institute A symposium to commemorate the 20th anniversary of the mile- stone paper "On the Motions of Ships in Confused Seas," by Dr. Manley St. Denis and Dr. Willard J. Pierson Jr., has been organized by Panel H-7 (Seakeeping Charac- teristics) of the Technical and Re- search Program of The Society of Naval Architects and Marine En- gineers. The purpose of the sym- posium is to present and discuss the current and future status of all aspects of seakeeping research and design applications. The sym- posium will take place at Webb Institute of Naval Architecture, Glen Cove, N.Y. 11542, on Octo- ber 18-19, 1973, with all technical sessions held in the new Henry Auditorium. In the 20 years since the St. Denis and Pierson paper was pre- sented. almost everyone connected with ship design all over the world has learned to understand the prin- ciples set forth in this paper. Dur- ing this time, rapid research prog- ress, partially stimulated by the paper, has been made in the study of accelerations, shipping water, incidence of slamming, wave-in- duced bending moments, bow sonar effectiveness, added resistance, and other aspects of seakeeping. Fur- thermore, designers of unusual craft—catamarans, hydrofoils, sur- face effect ships, and floating plat- forms—have been able to use the basic techniques of the St. Denis/ Pierson paper to ascertain seakeep- ing requirements for vessels for which there was no design prece- dent. The symposium will be divided into three successive sessions dedi- cated to waves, transfer functions and ship responses (theory and ap- plications), and 13 papers will be presented with ample time for dis- cussion. Each of the papers will include a short review of the prog- ress achieved over the past 20 years and will emphasize recommended future developments and applica- tions. The keynote address on Thursday, October 18, will be giv- en fay Dr. W.E. Cummins (Naval Ship Research and Development Center), to be followed by three papers on the prediction, measure- ment and application of wave data presented by Dr. V.J. Cardon, Dr. O. Oakley (University of Califor- nia, Berkeley), and Prof. D. Hoff- man (Welbb), and W. Marks (Po- seidon), respectively. Following a box luncheon served on the beautiful campus, the after- noon session will be devoted to subjects related to the transfer functions, with presentations by Prof. T.F. Ogilvie (University of Michigan), Prof. J.R. Paulling (University of California), and Dr. W.E. Cummins (NSRDC), respec- tively, on the theory, time domain analysis and problem areas. A banquet will be held on Thurs- day evening at the Swan Club in September 1, 1973 Glen Head to suitably 'honor the guests of honor, Professors St. Denis and Pierson. The session on applications will take place on Friday, October 19, and will include five papers cover- ing a wide-range of subjects by J.F. Dalzell (Davidson Labora- tory), Dr. M.K. Ochi (NSRDC), Prof. E.V. Lewis (Webb), J.B. Hadler (NSRDC) and T.H. Sar- chin (Naval Ship Engineering Cen- ter), and Prof. M.A. Abkowitz and C. Chrissostemidis (Massachusetts Institute of Technology). One complete set of preprints will be made available to each participant and T&R Report S-3, "Proceedings of Symposium on Seakeeping (1973)," which will include papers and discussions, will be available early in 1974. Advance registration fee (before October 1) is $75 for members of the Society and $85 for non- memhers, including Thursday lunch and banquet. Registration fee after October 1 will be $90 and $100 for Society members and non- members, respectively. All inter- ested persons are urged to contact Dr. Dan Hoffman, Symposium Or- ganizing Committee Chairman, at the W-eb'b Institute of Naval Ar- chitecture, Glen Cove, N.Y. 11542; telephone (516) 671-2356. Did you know Marathon has over 5,700 employees in five shipyards with competence in CRANE BARGES up to 1,600 tons, even sp« cial jackup crane barges that work in rough water TOW BOATS up to 8,000 HP OCEAN TUGS up to 20,000 HP SUPPLY BOATS up to 16,000 HP OCEANGOING BARGES up to 80,000 DWT LNG and LPG TANKERS up to 125,000 CM3 JACKUP DRILLING PLATFORMS SEMI- SUBMERSIBLE DRILLING PLATFORMS DRILL SHIPS MARINE CRANES up to 300' booms and 250 tons lift. i^ljl^Mi When you need help in the water, call the guys who've been there, Marathon LeTourneau Offshore (713) 224-8265. Chances are, we can either build it or repair it. marathon MARATHON LeTOURNE, OFFSHORE COMPANY Marathon Building Suite 1700, 600 Jefferson Houston, Texas 77002 A Subsidiary of Marathon Manufacturing Company Houston. Texas 77002 JiilCL Yards in Vicksburg, Mississippi, U.S.A.. Brownsville, Texas, U.S.A. Clydebank. Scotland, U.K., Singa pore, Republic of Singapore
