The newly revised edition of this material contains significant improvements and updates.  Creating a quiet ship is a complex process. A ship presents two diametrically opposite challenges to achieving a quiet environment. These are powerful equipment and propulsors inside and outside a confined floating space and comfort for the crew and passengers within that envelope. Just as a ship designer needs to consider power, speed, metacentric height, etc., they also should know about the acoustical design considerations prior to building the vessel. Fortunately, using the proper engineering, design tools, and appropriate planning, this process is relatively straightforward.