16th International Symposium on Boat & Ship Archaeology

100 16 th International Symposium on Boat & Ship Archaeology Grgo Jerat 1 , Smiljko Rudan 2 , Albert Zamarin 3 & Irena Radić Rossi 4 1 TE-Marine Ltd., Split, Croatia 2 University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia 3 University of Rijeka, Faculty of Engineering, Rijeka, Croatia 4 University of Zadar, Department of Archaeology, Croatia Uncertainty in the reconstruction of the ancient ship hull and its impact on sailing characteristics Reconstruction of the original form of the hull of an ancient ship is often made based upon a limited amount of evidence. Commonly, only parts of the ship’s hull and cargo are found on the shipwreck site. Due to the absence of information, it is inevitable that each reconstruction relies on assumptions to fill in missing data. The resulting hull form is, therefore, just one of many possible hull forms. The reconstructed ship’s sailing abilities, cargo space, displacement, and other ship characteristics, such as structural arrangement and scantlings, are directly related to the assumptions made during the reconstruction process. In the framework of the NEREAS Project (HRZZ IP-2020-02-3420), we ex- amined the effect of variations of the hull form on resulting ship characteristics, namely resistance and stability. The Kyrenia ship reconstruction was chosen as the study case. The Kyrenia reconstructed hull form was altered by reducing and enlarging the ship’s beam by 5% and 10% respectively. The Holtrop method was used to estimate the resistance of different hull forms, and the effect on ship’s speed was examined. Furthermore, the application of the Holtrop method was validated by a state-of-the-art Computational Fluid Dynamics calculation. Finally, stability of the ship in the case of each of the developed hull forms was examined. Further research may include variations of the structural arrangement and struc- tural elements scantlings and joints resulting from the differences in the recon- structed form of the ship’s hull.