by John W. As a designer of ships, and president of a vessel design company, I know the shipbuilding industry is made up of people who recognize the importance of ferries, cruise ships and other maritime vessels to our economy. These same people also care a great deal about the marine environment in which our ships operate. That's why reports by environmental groups criticizing the marine industry for supposed ecological offenses leave a bad taste in the mouths of those who know the whole story. For example, a recent report on cruise ships by the Oceans Conservancy (Hertz and Davis, Cruise Control, May 2004) states, "Some of the pollutants generated by these giant ships daily include as much as 37…