For example, the stresses at the double bottom of vessel (bottom of Fig. 5 (right)) are of high interest. Therefore, for the analysis of double bottom of the vessel, the global FEA model was refined. One element was used between longitudinal stiffeners and three elements were applied over the floor height. The cut-outs in floor plates at longitudinal girders were approximated by simple squares. This shows that the general characteristics of the FEA model can be controlled easily by parameters (e.g., element size at different parts, loads, boundary conditions) in POSEIDON. In this case, model creation in POSEIDON and then exporting to the FEA model for the cargo area took approximately 100 h. For comparison, the FEA model generation with a conventional FEA program would take normally several months.