MEDSLIK is a well established 3D oil spill model that predicts the transport, fate and weathering of oil spills and is used by several response agencies and institutions around the Mediterranean, the Black seas and worldwide. MEDSLIK has been used operationally for real oil spill accidents and for preparedness in contingency planning within the framework of pilot projects with REMPEC-Regional Marine Pollution Emergency Response Centre for the Mediterranean Sea and EMSA-European Maritime Safety Agency. MEDSLIK has been used successfully during the Lebanon oil spill pollution crisis, in summer 2006, which is considered the biggest so far oil spill pollution incident in the Eastern Mediterranean Sea. Moreover the Medslik is used for the prediction of floating objects and is used by search and rescue operation centres in the Mediterranean.