In order to integrate information in design and manufacturing stage, System of Design and Assembling for Shipbuilding (SODAS) was developed in the report 1. In the report, design of bulk-carriers are mainly discussed on the concept of “UNIT”. In the report 2, activity model and facility model in assembling stage are introduced. As the result, it was shown that design of element parts is easily conducted by using the information of hull structure which was obtained in the report 1. In this paper, design of oil-tanker model is again discussed. At first, it is shown that structures of oil-tanker can be parametricaly designed by using “plane type of UNIT”. And then it is also shown that it is very important to combine “box type of UNIT” for bulk-cariers and “plane type of UNIT” for oil-tankers in order to make ship model for any kind of ship. It is needless to say that the information of designed oil-tanker can be used in assembling stage prescribed in the report 2.