Performance evaluation of fishing schemes

Abstract

Fishing vessels for mechanization of trawl fishing operations have a wide variety of fishing schemes and complexes. Design of the existing schemes is carried out according to prototypes, which is the reason for the low level of mechanization of fishing operations, which does not exceed 40 %. In turn, a significant proportion of manual labor leads to an increase in unproductive time and, as a result, inefficient use of vessels in commercial fishing. As practice shows, an increase in the effectiveness of the work of courts is possible by increasing the level of mechanization of operations. In order to develop design methods and improve field schemes, an assessment of the effectiveness of the existing schemes has been carried out, where the mechanization coefficient is taken as a fundamental criterion. The selected criterion is the ratio of the number of operations carried out by mechanized means to the total number of fishing operations performed by the trawl. One of the methods for such an assessment is compilation of morphological maps. For the present study, a review and analysis of the fishing schemes and complexes for 22 trawl fishing vessels, covering trawlers with a power of 141 kW to 5148.6 kW has been carried out. After evaluating the effectiveness of these vessels, the dependences of the mechanization coefficient on the power of the power plant and the power of the fishing equipment spent on operations have been obtained. The dependencies obtained allow us to evaluate the influence of the power indicators of power plants and equipment on the mechanization coefficient, which can serve as the basis for the development of methods for designing fishing schemes for trawlers under construction, as well as improving the fishing schemes of trawlers used in operation.