While the U.S. shipbuilding industry has diminished over the past few decades, some are still welding, riveting and brainstorming to fill the oceans and waterways with pleasure boats and enormous freighters that can drift by in relative silence. But before the actual hands-on labor can begin, concepts and designs are created on paper and computer screens. Shipwrights and designers alike are no longer mainly focused on churning out what’s “tried and true.” As the 21st century presses on, maritime vessel designers are becoming more attuned to specific needs and global technology, all while trying to minimize their impact on our…