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            - View ports during simulation can be change using pocket menu.
            The results of container loadinglunloading simulation is as follows:
            - The sequence Diagram of container loadinglunloading
            - The operation time of container loadinglunloading
            - The result of stability assessment for ship during container loadinglunloading.
            - The collision examination between ship and port during container loadinghloading simulation
            - The optimal arrangement of cranes
















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                        Figure 7.  Procedures of Simulation for Container LoadingKJnloading

            The procedures of simulation for decision of the  number and  optimal position of  crane using the
            operation time are shown in Figure 8. In this paper, the number of crane considered is within three
            cranes.
            The optimization of  container loadinglunloading process is  shown in Figure  9. To  decide optimal
            process of container loadinghloading, the developed system only considers the operation time and
            not loadinglunloading costs.
            Figure  10 shows the  visualization of container arrangement on deck and the visualization of cross
            sections for a  frame. Figure  11 shows procedures of  stability assessment for ship during container
            loadinglunloading. The results of stability assessment use GM value. If GM value deviates from limits
            of stability criteria, system is terminated. Figure 12 shows the visualization for the results of stability
            assessment. Figure 13 shows collision examination between port and ship using intersection method.


            4  CONCLUSIONS

            In  this  paper,  we  investigated state-of-the-arts  for  SBD technologies and  related  researches,  and
            developed container loadinglunloading simulation system for high-speed medium size container ship
            using SBD technologies.
            The shape of  hull  form,  compartment, cargo,  and  facilities are defined using  the  3D  commercial
            geometric modeling system. The application programs for stability assessment of ship are in-house
            programs.  The  Graphical User  Interface for  the  visualization and  control  of  inputloutput data  is
            adopted for the efficient use of developed system.
            Finally, we developed simulation system for the visualization of stability and behavior of ship, the
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