Page 35: of Maritime Reporter Magazine (June 15, 1970)

The New York Metropolitan

Section of The Society of Naval

Architects and Marine Engineers held its April meeting at the Over- seas Press Club, 54 West 40th

Street, New York City.

At the technical session, which followed the cocktail hour and din- ner, Dr. Michel K. Ochi, NSRDC,

Washington, D. C., presented a paper entitled "A Method to Esti- mate Slamming Characteristics of

Ship Design."

This paper discusses a method to estimate slamming characteristics of a ship in its early design stage, using the ship lines. The first sec- tion of the paper deals with the derivation of a regression equation which yields a coefficient neces-

McClatchy Appointed

Sperry Marine Systems

Field Engineering Mgr.

Alfred C. McClatchy

Alfred C. McClatchy has been named manager of field engineer- ing and service operations for

Sperry Rand's Sperry Marine

Systems Division, Charlottesville,

Va. Mr. McClatchy, who formerly served as eastern regional manager for Sperry's marine field service organization, is stationed at the division's headquarters in Char- lottesville. He succeeds Warren C.

Judge, who has been promoted to operations manager of the division.

Among Mr. McClatchy's new re- sponsibilities will be implementa- tion of an expansion program for the marine service network, accord- ing to James A. Nottingham,

Sperry Marine Systems vice-presi- dent and general manager.

Mr. McClatchy has 28 years of sary to estimate impact pressures for any given hull form. The sec- ond section discusses the proce- dure of application of the regres- sion equation in conjunction with other computer programs to esti- mate frequency and severity of slamming for ship design. An ex- ample of the method using a ma- riner type vessel is developed to estimate limiting sea state or lim- iting ship speed below which the ship can be safely navigated with- out suffering from slamming.

Copies of the paper may be ob- tained at $2.50 per copy by con- tacting Norman R. Farmer, secre- tary-treasurer of the New York

Section, c/o George G. Sharp, Inc., 100 Church Street, New York, N.Y. 10007. experience in Sperry's Field Engi- neering organization, having start- ed as a marine service engineer in 1942. He served as manager of its eastern district office in Brooklyn,

N.Y., before transferring to Char- lottesville in 1968. He attended

Columbia and Long Island Univer- sities, and is a member of The So- ciety of Naval Architects and Ma- rine Engineers and the Institute of

Navigation.

Sperry Marine Systems Division is a leading supplier of marine navigation aids and control equip- ment. It maintains an extensive world-wide sales and service net- work.

Kenneth M. Childs Jr.

Opens Own Office

In Medfield, Mass.

Kenneth M. Childs Jr. announces the opening of his office for the practice of waterfront and struc- tural engineering. His address will be Box 204, Medfield, Mass. 02052.

Services will include complete de- sign of new projects, evaluation of existing structures, feasibility re- ports, etc. Mr. Childs will be avail- able also as a marine surveyor for the inspection and evaluation of piers, pipelines, pile foundations, dry docks, and similar structures.

This service will include investiga- tion both above and below water, as Mr. Childs is an experienced diver who has made similar inspec- tions in North America, Europe, the Caribbean, and the Society Is- lands in the Pacific Ocean.

From 1956 until the opening of his office in May of this year, Mr.

Childs was associated with Cran- dall Dry Dock Engineers as a vice- president, and with Crandall's sub- sidiary, Crandall Marine Corpora- tion, a marine contracting com- pany, as its president. During this period he was involved in the design and construction of sev- eral marine railway dry docks, float- ing dry docks, and other water- front structures.

Mr. Childs is a graduate of the

Massachusetts Institute of Tech- nology, holding a degree in civil engineering. He is a registered pro- fessional engineer in Massachusetts and in the provinces of New Bruns- wick and Newfoundland. He is a member of The Society of Naval

Architects and Marine Engineers and the American Society of Civil

Engineers.

SNAME New York Section Hears Paper

On Slamming Characteristics Of Ship Design

Shown at the Overseas Press Club, left to right: Robert G. Mende, SNAME national secretary; J.J. Henry, SNAME president; Monroe D. Macpherson, chairman N.Y. Metro- politan Section; Dr. Michel K. Ochi, author; Warren I. Signell, section vice-chairman;

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June 15, 1970 37