Page 39: of Maritime Reporter Magazine (December 1973)

Seakeeping Symposium Held At Webb Institute

Participants pictured at the two-day Webb symposium, back row (left to right), Owen Oakley Jr., University of

California, author; Nils Salvesen, NSRDC, co-chairman;

R. Wermter, NSRDC, chairman; T. Francis Ogilvie, Uni- versity of Michigan, author; D. Hoffman, Webb Insti- tute of Naval Architecture, author; Vincent J. Cardone,

City University of New York, author, and J.F. Dalzell,

Davidson Laboratory, author. Middle row (left to right),

Robert F. Beck, University of Michigan, author; Willard

A crowd of 125 people gathered in the Henry

Auditorium at Webb Institute of Naval Archi- tecture for the day-and-a-half Seakeeping Sym- posium on October 18-19, organized by Panel

H-7 (Seakeeping'Characteristics) of the Tech- nical and Research Program of The Society of

Naval Architects and Marine Engineers to commemorate the 20th anniversary of the St.

Denis/Pierson paper "On the Motions of Ships in Confused Seas," (Transactions, S'NAME, 1953). Of the participants, approximately 50 were from industry, 25 from universities, and the balance from Government agencies or re- search laboratories.

At the symposium banquet on the first eve- ning, the honored guests, Dr. Willard J. Pier- son Jr. of the City University of New York, and Dr. Manley St. Denis of the University of

Hawaii, gave their own presentations in the fields of oceanography and seakeeping, respec- tively. They were introduced by Rear Adm.

Albert G. Mumma, USN (ret.), former presi- dent of The Society of Naval Architects and

Marine Engineers, who was master of cere- monies. The 'finale was the presentation by

Phillip Eisenberg, president of the Society, of

Certificates of Appreciation with a citation which read "To Manley St. Denis and Willard

J. Pierson Jr., who changed our thinking about the ship, the sea and the ship upon the sea."

The text was written by the late Wilbur Marks (member), who had been one of the principal organizers of the symposium.

The technical meetings were divided into three sessions dedicated to waves, transfer func- tions and ship responses. Dr. W.E. Cummins of the Naval Ship Research and Development

Center gave an introductory keynote address.

The program was as follows:

Wave Session: chairman, Prof. B.V. Korvin-

Kroukovsky (retired) ; co-chairman, F. Sellars,

MPR Associates. "Ocean Wave Prediction:

Two Decades of Progress and Future Pros- pects," by Vincent J. Cardone, City University of New York; "Directional Wave Spectra Mea- surement and Analysis Systems," by Owen H.

J. Pierson Jr., City University of New York, guest of honor; W.E. Cummins, NSRDC, author and chairman,

Panel H-7; Manley St. Denis, University of Hawaii, guest of honor, and B.V. Korvin-Kroukovsky (retired), chairman. Front row (left to right), Martin A. Abkowitz,

M.I.T., author; R.B. Zubaly, Webb Institute, co-chair- man; E.V. Lewis, Webb Institute, author; F. Sellers, MPR

Associates, co-chairman; J.R. Paulling, University of Cali- fornia, author, and Michel K. Ochi, NSRDC, author.

The guests of honor at the symposium were Dr. W.J. Pier- son and Dr. M. St. Denis (right).

Oakley Jr., University of California; "Applica- tion of Wave Inputs to Seakeeping," by Dan

Hoffman, Webb Institute of Naval Architec- ture, and Wilbur Marks (deceased).

Transfer Function Session: chairman, R.

Wermter, NSRDC; co-chairman, Dr. N. Sal- vesen, NSRDC. "Transfer Functions for Pre- dicting Ship Motions : A Review of the Theory," by T. Francis Ogilvie and Robert F. Beck,

University of Michigan; "Numerical Simula- tion of Large^Amplitude Ship Motions in

Astern Seas," by J.R. Paulling and Paul D.

Wood, University of California; "Pathologies of the Transfer Functions," by W.E. Cummins,

NSRDC.

Application Session: chairman, Dr. P. Kap- lan, Oceanics, Inc.; co-chairmen, Prof. R.B.

Zubaly and R. van Hooff, Webb Institute. "The 'Input-Output' Approach to Seakeeping Prob- lems—Review and Prospects," by J.F. Dalzell,

Davidson Laboratory; "Review of Recent Pro- gress in Theoretical Prediction of Ship Re- sponses to Random Seas," by Michel K. Ochi,

NSRDC; "Long-Term Applications of St.

Denis/Pierson Technique to Ship Design," by

E.V. Lewis, Webb Institute; Seakeeping Cri- teria and Specification," iby J.B. Hadler, NSR-

DC, and T.H. Sarchin, Naval Ship Engineering

Center; "Applications of the Spectral Tech- nique to Design and Operation," by Martin A.

Abkowitz, Massachusetts Institute of Tech- nology. .

Symposium Banquet: "Forecasting and Ob- serving Waves, Winds and Weather at Sea," by Willard J. Pierson Jr., City University of

New York; "Looking Backward and Ahead at

Seakeeping Research," by Manley St. Denis,

University of Hawaii.

The proceedings of the symposium, includ- ing summaries of the lively discussions pre- pared by the co-chairmen, were available for distribution to all participants and for sale to others in the near future.

The chairman of the steering committee for the symposium was Dr. Dan Hoffman, assisted by Dr. W.E. Cummins, J.F. Dalzell, W. Marks (deceased), and R. Wermter. The committee wishes to thank the authors, chairmen, co- chairmen and all participants for their whole- hearted cooperation in the affair.

Nat'l Bulk Affiliate Orders

Four 446,500-Dwt Tankers

From IHI Kure Shipyard

I HI (Ishikawajima-Harima Heavy Indus- tries Co., Ltd.), Japan, recently concluded a contract to build four 446,500-dwt tankers with Meridian Transportation Company (Li- beria), an affiliate of National Bulk Carriers

Inc. (NBC) of the United States. The con- tract was signed in Tokyo by Dr. Hisashi

Shinto, president of IHI, and E.L. Hann, vice president, Far East operations of NBC. The total contract price amounts to approximately 80,000 million yen.

The four tankers will be built at the IHI

Kure Shipyard and completions are respec- tively scheduled for September 1976, January 1977, May 1977, and September 1977. Each tanker will have the following approximate measurements: overall length of 1,183 feet, molded breadth of 223 feet, molded depth of 104 feet, and draft of 82 feet. They will be equipped with a 45,000-shp IHI turbine de- veloping a service speed of 15.9 knots.

Since 1964, National Bulk has placed or- ders with IHI for 27 ships totaling 5,635,000 dwt. This includes the four tankers ordered above, and eight 264,000-dwt tankers and three 326,000-dwt tankers.

SPECIAL SHAPES FROM ARMCO: Spoke gears for an offshore jackup drilling platform get a final check from an Armco Steel metallurgist before shipment. The 87- inch-diameter gears were cut from 5-inch-thick tailored alloy steel, designed for the application and produced at Armco's Houston Works. Cutting was numerically controlled and provided extremely close tolerances from a battery of natural gas torches. The gears and simi- larly torch-cut gear racks will be part of a platform used to locate and develop new offshore oil and gas reserves.

December 1, 1973 43