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www.sname.org/sname/mt July 2011Published by the Society of Naval Architects and Marine Engineers 601 Pavonia Avenue, Jersey City, NJ 07306 Phone: 201-798-4800 Fax: 201-798-4975 www.sname.org/sname/mt Edward Comstock President ecomstock@sname.org Erik Seither Executive Director eseither@sname.org Susan Evans Grove Publications Director sevans@sname.org Douglas R. Kelly Editor dkelly@sname.org Alan Rowen Book Review Editor arowen@sname.org Dave Weidner, Advertising Sales advertising@sname.org Tommie-Anne Faix, Publications Sales Associate tfaix@sname.org Editorial Advisory Board Design Bates Creative Group, Silver Spring, MD O cers of the Society Edward Comstock, President Erik Seither, Executive Director Bruce Rosenblatt, Treasurer Regional Vice Presidents 2011:Central & Gulf: Frank G. Bercha Atlantic South: William M. Hayden Paci?c: William B. Hale Atlantic North: John Volc International: Stavros Hatzigrigoris 2012: Paci?c: Gary Thompson Atlantic North: William Caliendo 2013: Central & Gulf: Joseph H. Comer, III Atlantic South: H. Paul Cojeen International: John Kokarakis Publication in (mt) Marine Technology does not constitute an endorsement of any product or service referred to, nor does publication of an advertisement represent an endorsement by the Society of Naval Architects and Marine Engineers or the magazine. All articles represent the viewpoints of the authors and are not necessarily those of the Society of Naval Architects and Marine Engineers, or the magazine. Subscriptions: (mt) Marine Technology is circulated to all members of the Society as a portion of their dues allocation. Non-member subscriptions are $120 annually for the U.S. and possessions; single copies are $35. For international non-members, subscriptions are $130 annually; single copies are $35. (mt) Marine Technology is dedicated to James Kennedy, 1867-1936, marine engineer and longtime member of the Society, in recognition and appreciation of his sincere and generous interest in furthering ship design, shipbuilding, ship operation, and related activities. (from the editorial board ) July 2011Anyone who has been part of a major expansion or overhaul project knows how impor- tant it is for a business to keep the doors open? while the work is underway. For most organizations, shutting down operations while major infrastructure is upgraded and improved is not an option. e Panama Canal Authority (APC) lives with this reality every day as it continues to pro- cess vessels through the canal at an annual rate of 14,000-plus transits?all while undergoing an enormous expansion project aimed at increasing the capacity of the canal to meet 21st century demand. Coordinating the expansion work with the day-to-day operations of the canal requires a exible planning process, and that includes the ability to quickly react to changing condi- tions and events. Such exibility is important also for shipbuilders and their customers as they evaluate vessel size and capability. Were getting questions from a lot of shipbuilders,? says Jorge Quijano, executive vice president of engineering and programs management at APC. Basically, their customers come in and say, I need an x, y, z size vessel. en the shipbuilder or designer says, But when you do it that size, thats bigger than what the new [Panama Canal locks] will take. Do you really want to do that? Some of them will then decide that its better to go down in size in order to keep that ex- ibility, while still building in the extra capacity just in case they need to use it at any given time. So I believe that the dimensions for the new locks have become a standard for shipbuilders and those that are buying [new vessels].? For more on Jorges thoughts on the expansion program, see e inking Behind the Expansion,? starting on page 34. Ensuring that Post-Panamax vessels are in compliance with the new locks is just good business, according to Octavio Stagg, a naval architect with the Transit Operations Division at APC. Given the scale of investment involved in building and operating Post-Panamax ves- sels, non-compliance is not an option for vessels that fall within the size/draft limitations of the new locks. Whats more, Post-Panamax vessels that comply enhance their resale value, even if they never transit the canal.? Octavio has turned in a detailed and informative look at how the new locks will impact ship design and construction. Youll nd it beginning on page 26 of this issue focused on the Panama Canal expansion, which also features content exploring the projects engineering challenges and the ways the new locks will aect such vessels as cruise ships and tugboats. Its an information-packed issue of (mt) and I hope it will challenge and expand your thinking. Douglas R. Kelly Editor Intentional Flexibility Jay P. Carson, Chair Rod Allan Chris Cikanovich Chris Dlugokecki Vicki Dlugokecki Norbert DoerryJay Edgar Andrew Harville Peter Tang Jensen Keith Michel Peter Noble Jeom Paik Hans Payer Erik SeitherMatt Tedesco A Panamax-size vehicle carrier transits north under Panamas Centennial Bridge as heavy equipment removes thousands of cubic meters of material as part of the dry excavation to create the Paci?c Access Channel.