Authors have developed a CAD system with the design support by the Semantic Web and workflow. The system aims to support designers by retrieving the appropriate knowledge by documents, data and so forth with the semantic web and also by giving the design guide with the workflow system. The system has been extended to support the ship basic design from the decision of principal particulars to the hydrostatic characteristic. As for the core CAD system, the TRIBON is employed in this paper. The proposed system shows the effectiveness and efficiency for the ship basic design by illustrating an example practice of design scenario of a bulk carrier.