It is my great honour to introduce the latest 56 (128) issue of Scientific Journals of the Maritime University of Szczecin. The current issues contains the latest research in the field of marine technology, transport and logistics.
The introductory paper entitled “Practical approach to calculating the hydrodynamic oscillating loads of a ship propeller under non-uniform wake field” has been written by the world-class expert in fluid mechanics, Prof. Hassan Ghassemi, professor of marine engineering at the Amirkabir University of Technology. The article presents selected issues related to hydrodynamic modelling of screw propellers. The publication was prepared in connection with our implementation of the project funded by the Ministry of Science and Higher Education of the Republic of Poland from the fund for science-popularising activities (grant No. 790/P-DUN/2016). The author’s remuneration and costs of publication were covered by the Rector of the Maritime University of Szczecin from funds for international cooperation. I hope that the relevance of the publication will contribute to its attractiveness to all readers interested in optimising the vessel power systems.