The present proceedings of the 10 th international workshop "Methods for the Development and Evaluation of Maritime Technologies - DEMaT" can be taken as a great proof of the continuity and the knowledge-based progress, which has also been generated by the DEMaT community of mainly European and Asian scientists in different fields of fishing engineering and fishery research in the past 18 years since 1993. The peculiarity of this DEMaT workshop lies probably in the fact that in spite of modest financial means of all parties involved we again and again succeeded in promoting not only the necessary scientific exchange between single partners but also in integrating students already at an early stage in this international community of engineers and scientists. These workshops have considerably increased the scientific inspiration of the participants, strengthened friendly relations between colleagues and significantly contributed to the international development in the area of fishing engineering including aquaculture and the theory of the fishing systems. So for the fishing engineers mathematical modelling, numerical analysis or model experiment must be seen as natural tools in the analysis and development of fishing gears today. FEM analyses and CFD simulations are by no means foreign words. The DEMaT workshops have also contributed to a sharpened consciousness for a sustaining fishery. This is especially testified in those contributions dealing directly with the interaction of fishing gear and environment. But theory remains insufficient, if validation and confirmation of scientific results in practice are missing. In this connection the reader may expect an interesting and scientifically demanding reading.