This thesis project presents the proposed method of modifying the length of the passenger vessel hull. The aim of this thesis project is to evaluate the method proposed and validate the performance of the hull. The scope of the work covers the literature and background study of previous work regarding the effect of changing the hull’s length, performing different cases of lengthening the hull and finally suggesting the new elongate hull form that gives the best performance. Few types of software are used such as Maxsurf Modeler, Maxsurf Resistance, Maxsurf Stability and Rhinoceros 5 3D.