Dear Readers
      Welcome to issue 41 of the Scientific Journals of the Maritime University of Szczecin. The scope of our quarterly is concentrated around sea-related aspects.

     In this issue there are four papers devoted to an overview of solutions in terms of renewable energy, including sea wind farms, tidal and wave energy conversion, and three papers on ship propulsion systems modelling. You cannot miss a very interesting article in the area of marine traffic engineering which describes the port basin as a waterway system component. What is more, there are a few papers on selected aspects of tribology, marine traffic safety, cartography and seamen manning agency operation.

     As for readers - please do not hesitate to send us any comments and suggestions concerning the development of our magazine. All authors, on the other hand, are welcome to send their manuscripts. To access the electronic version of the current and back issues, I encourage all the  interested to visit the website available at                                                                                                           
                                                                                                            Leszek Chybowski, PhD, CRP
                                                                                                            Szczecin, 26.03.2015     
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