Mitsubishi Shipbuilding Co., Ltd. offers a 3D viewer named "HullViewer®/FitViewer®," which is suitable for use at each stage of arrangement design and production work in shipbuilding. In general, 3D viewers enable one to understand a product more intuitionally than 2D drawings, preventing misinterpretation of drawings and allowing smooth communication between workers. The features and functions of the product are presented below.