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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
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      <title>RECENT DEVELOPMENTS IN ANTIFOULINGS</title>
      <link>https://trid.trb.org/View/72305</link>
      <description><![CDATA[Largely as a result of increasing fuel costs, detailed investigation has recently been carried out on the problem of controlling the growth of fouling on the underwater hulls of ships.  The biology of fouling organisms has been extensively studied and there is now a much better understanding, particularly of algal fouling.  Fouling is an extreme aspect of the general problem of hull roughness which develops as a consequence of the traditional approaches to underwater hull maintenance.  It is suggested that the practice of cleaning and repainting at frequent intervals, using traditional materials, does not provide the ideal answer either in terms of fouling control or long-term control of roughness.  The more recent approaches of diffusion control by hydrophilic varnishes, the introduction of scrubbable coatings, and self-polishing copolymer antifouling systems give an indication of the effort that the marine coatings industry has made towards providing improved ship performance.  Order from: BSRA as No. 47,359.]]></description>
      <pubDate>Sat, 12 Apr 2003 00:00:00 GMT</pubDate>
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      <title>SERVICE EXPERIENCE WITH HYDRON DYNAMIC</title>
      <link>https://trid.trb.org/View/60663</link>
      <description><![CDATA[Hydron Dynamic is a hydrophilic acrylic coating with drag-reducing properties introduced by Hempel Marine Paints in 1974.  This paper reviews some recent research on the influence of surface roughness on friction coefficient and presents the results from practical experience with the Hydron Dynamic concept on more than 100 ships. Order from: BSRA as No. 47,205.]]></description>
      <pubDate>Tue, 07 Mar 1978 00:00:00 GMT</pubDate>
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      <title>HYDROPHILIC SHIP BOTTOM SYSTEM TO IMPROVE A SHIP'S PERFORMANCE IS A METAL FINISHING SOLUTION</title>
      <link>https://trid.trb.org/View/26943</link>
      <description><![CDATA[The surface roughness affects both the frictional resistance of a ship, and the perpendicular transport processes at the hull/seawater interface under turbulent conditions.  The surface preparation and paint coating procedures on a new building should be upgraded in order to deliver a ship with an ultra-smooth hull.  Not only macro roughness, but also micro roughness plays an important role.  The settlement of micro fouling should be studied under turbulent conditions. A hydrophilic coating will smooth the ship's hull by maintaining a continuous laminar sublayer and thus reducing drag and controlling the release of toxin from antifouling paints.]]></description>
      <pubDate>Mon, 19 May 1975 00:00:00 GMT</pubDate>
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