Here, POSEIDON was used for the structural analysis of a 5000 t pure-car-truck carrier with hinged deck design, Table 1, Fig. 4. The main characteristic feature of a hinged design is that the transverse structures of decks and sides are designed for structural flexibility, so that the racking deformation of decks above the main deck can be tolerated. The hull shape was created by PIAS (Program for the Integral Approach of Ship Design), PIAS (2005), and then it was exported to POSEIDON in order to create the structural model.