Page 12: of Maritime Reporter Magazine (May 15, 1984)

SNAME San Diego Section

Hears Paper On Sheathing

Hulls With Copper-Nickel

The San Diego Section of The

Society of Naval Architects and

Marine Engineers gathered re- cently at the Harbor House to hear a paper by D.W. Czimmek and L.W. Sandor titled, "Eco- nomic and Technical Feasibility of

Copper-Nickel Sheathing of Ship

Hulls."

Mr. Czimmek is a research project engineer at Newport News

Shipbuilding and Dry Dock Com- pany in Virginia; Dr. Sandor is manager of materials technology at the Franklin Research Center in Philadelphia. Both authors are members of the SNAME Technical and Research Panel HS-9. In 1979, this panel became interested in copper-nickel sheathing as a bio- fouling protection of ship hulls.

Mr. Czimmek investigated the economic feasibility of copper-nickel sheathing for two ship types on a life-evcle basis. The ship types chosen were an 18,000-dwt RO RO vessel and a 280,000-dwt tanker.

Three different antifouling sys- tems were traded off in his stud- ies—conventional antifouling paint,

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Circle 301 on Reader Service Card

When you go to sea, you need a lifeline you can always trust. Under all circumstances. With no exceptions.

That's why the Harris RF-230M HF-SSB syn- thesized transceiver belongs on your boat. It's built to the same exacting standards of quality and con- venience that have made its military counterpart standard equipment for combat use. And its repu- tation for reliability is backed up by sales: more than 5,000 units sold worldwide for land and mari- time use.

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See us at AFCEA, June 19-21, Booth A240. self-polishing copolymer (SPC), and copper-nickel sheathing.

Dr. Sandor addressed the tech- nical feasibility of copper-nickel sheathing. Four methods of at- tachment were discussed. Test re- sults were presented of the in-ser- vice performance over a period of two years for four groups of sheathing panels attached by the various methods to the 90,000-dwt tanker Arco Texas. New, cost-ef- fective welding techniques for cop- per-nickel sheathing were also introduced.

The results of the analysis indi- cate that there is an economic ad- vantage to ship operators by sheathing their vessels with cop- per-nickel. Some of these advan- tages are: low hull surface friction for the ship's life, resulting in fuel savings, reduced maintenance cost, and reduced drydocking time. En- vironmental problems due to toxic waste associated with the removal of conventional antifouling paint and SPC during recoating of ship hulls are eliminated as well.

Marine Safe Electronics

Offers Free Literature

On 'Fail-Safe' Line

Interesting literature that dis- cusses the minimizing of overall operational costs in the shipping industry by judicious expenditure on maintenance is available with- out charge from Marine Safe Elec- tronics, Concord, Ontario.

Titled "Preventive Maintenance of Electric Machines Assures Lower

Operating Costs," and written by

Arie Lapsker, vice president of engineering, Marine Safe Elec- tronics, the nine-page discussion concludes that a policy of cost re- duction by avoiding unnecessary and expensive electrical machine re-winds should be an indispensa- ble component in achieving profit- able operation of vessels in today's highly competitive business environment.

The author points out that the most serious insulation break- downs occur during the starting period and until a few years ago an effective warning device that could monitor a machine while it is idle was not available commer- cially, but that a comprehensive range of insulation-monitoring re- lays for marine motors and gener- ators is now offered by Marine

Safe Electronics of Canada Ltd. under the name of "Fail-Safe"".

For a free copy of the "Fail-Safe" literature.

Circle 91 on Reader Service Card

Circle 316 on Reader Service Card