Page 10: of Maritime Reporter Magazine (November 1980)

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Key participants at recent International Paint Company seminar held at New York

Yacht Club were (L to R): R.A. Hartley, senior technical vice president of Inter- national Paint Company, Inc.; Dr. R.L. Townsin, professor at the University of

Newcastle-upon-Tyne, England; T.M. Reinhardt, president of International Paint

Company, Inc.; and G.C. Johnson, executive vice president of International Paint

Company (California), Inc.

International Paint Seminar

Stressed Importance Of Smooth Hull

International Paint Company,

Inc. of Union, N.J., recently spon- sored a technical seminar concern- ing the economic importance of hull condition. It featured Dr.

Robert L. Townsin, professor in the Department of Naval Archi- tecture and Shipbuilding at the

University of Newcastle-upon-

Tyne, England, and was attended by representatives of shipowners and operators from around the


Dr. Townsin is a world-known authority on ship hydrodynamics, hull roughness, and ship perform- ance measurement. He is a Fellow of the Royal Institution of Naval

Architecture in the U.K. and a member of The Society of Naval

Architects and Marine Engineers.

At the recent Shipboard Energy

Conservation Conference '80 in

New York Dr. Townsin, together with Tor Svensen, presented his most recent paper entitled Moni- toring Speed and Power for Fuel


Among the topics covered at the seminar were: the causes of hull roughness; practical meas- urement of hull roughness — de- vices and techniques; the rela- tionship between hull roughness and power; techno-economics of hull condition; and ship perform- ance.

According to Dr. Townsin, foul- ing is an economic disaster be- cause of the enormous additional fuel required to overcome the added drag it causes (five percent fouling requires about 10 percent more fuel). However, thanks to organotin copolymer antifoulings such as Intersmooth SPC, fouling is a thing of the past, Dr. Town- sin claimed.

Physical hull roughness is more insidious, as it increases through- out the life of a vessel using tra- ditional antifoulings under nor- mal maintenance practices. Dr.

Townsin suggested a number of steps to take to reduce the severe economic impact of the physical hull roughness caused by, among other things, painting in the dry- dock and deterioration of spent traditional antifouling.

These steps included stricter at- tention to surface preparation, use of proper spray coating tech- niques, and coating the under- water hull with self-polishing co- polymer antifouling to smooth the hull in service. Finally, Dr. Town- sin spoke about the desirability of monitoring ship performance to insure economic operation.

International Paint Company,

Inc. is part of a worldwide orga- nization with operations in 23 countries. The company's princi- pal business is the manufacture and sale of paints in the marine, yacht, and protective coatings markets. Worldwide sales in the year ending March 31, 1980 were more than $550 million. The com- pany's U.S. manufacturing plants are located in Union, N.J., New

Orleans, and San Francisco.

Navy Awards Jonathan $5.6-Million Contract

For Work On AFS Vessels

The Jonathan Corporation, Nor- folk, Va., has been awarded a $5,589,738 cost plus award fee contract for advanced planning, design work, repair and overhaul of AFS (combat store ship) class vessels. The Naval Sea Systems

Command is the contracting ac- tivity. (N62678-81-C-0001)






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First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.