A Design Study of Turkish Black Sea Fishing Vessels

[摘要] This thesis presents a design study of Turkish Black Sea fishing vessels, which are mostly built by traditional methods. These vessels provide the highest catch rate of Turkey's total, and their numbers and sizes are increasing year by year. The Black Sea fishing vessels rely heavily upon anchovy stocks for their survival. In this study it has been assumed that the anchovy stocks are reasonably abundant to exploit. Because of the growing importance of the Black Sea fishing vessels in Turkey's fishing structure, it was considered to be worthwhile carrying out such study on this particular type of vessels. This thesis, therefore, contains detailed information on the Black Sea fish and fish stocks and it covers the general aspects of Turkey's fishery structure. This thesis provides a basic understanding of the design of a fishing vessel and outlines the factors that influence the design in general. A number of formulae of practical use are presented to estimate the main dimensions and group masses for preliminary design purposes. The thesis then focuses on the Black Sea fishing vessels which are of major interest to the study. A representative fishing vessel of the Black Sea type, called the parent vessel, was chosen to be analysed on the basis of the data collected from Turkey. The lines plan of the parent vessel has been redrawn to build a model, whose scale was 1/12.5. The towing experiment, on which basis the speed-power curve of the parent vessel has been evaluated, was conducted in the Hydrodynamic Laboratory of Glasgow University. The hydrostatic and stability characteristics of the parent vessel have been determined by using a computer program from the WOLFSON UNIT, which is available in the Department of Naval Architecture and Ocean Engineering. Having analysed the parent vessel it was possible to improve certain features of the traditional design. In accordance with the improvements made within the parent vessel, two sets of general arrangement plans have been produced. On the structural side of the study, a comparison of midship sections between the parent vessel and the proposed vessel based on the Lloyd's Rules has been made. The proposed design has also been checked for longitudinal strength and stability based on IMO criteria. An economic model of the Black Sea fishing for anchovy has been included. In this study, all costs are expressed in US$ and decisions about loans, interest rates and inflation rate reflect Turkish Government's policy as it was at the time of writing of this thesis.

[发布机构] University:University of Glasgow

[关键词] Naval engineering