LOADING AND UNLOADING CALCULATION FOR THE TANKER DESIGN PURPOSE

The problem of loading and unloading procedure of new tankers is dealt with in the preliminary and project design stage as one of the predominant tasks. The new port arrangement, such as the increase of loading and unloading capacity, is the second important request for the control of discharging and the control of the ship\u27s technical behavior. Due to the uncontrolled loading/unloading procedure, the technical calculation of loading/unloading procedure is nowadays more and more requested because of the incidents which are dangerous both for life and property. This conclusion about the necessary calculation by which we are continuously controlling the unloading/loading procedure concerns all ship types. The calculation of the loading/unloading procedure for certain double hull tankers is based ,on-line specially oriented ship stability control. In recent years, the main design parameters in cargo and ballast tanks arrangement in double hull tankers have resulted in partially undefined design solutions. The dilemma is focused on whether to incorporate, or not, the central longitudinal bulkhead in cargo tanks area. The additional dilemma is whether to incorporate, or not, the longitudinal central girder in double bottom. The choice of main dimension ratio is also an element for further investigation in recent new tankers design. The new rules requirements about satisfying damage stability in comparison with the ship\u27s intact stability requirement, also influences the adequate recommendations for evaluation of damage condition with reduced damage extents. The future tanker design optimization for double hulled tankers will be one of the most attractive tasks for shipyard and shipping companies, and the continuation and enlargement of this work has to be expected