Towing Power Efficiency

Summary

This project has been undertaken with a view to establishing relationships between the different factors which might improve or impair the effectiveness of a fishing vessel in the trawling mode. The intention is to provide a set of factors which can be applied to the basic specifications of a fishing vessel to give an accurate indication of its towing performance. A possible application is seen in the transfer or aggregation of fishing vessel licences and in which the current indicator of towing performance (or vessel capacity) is expressed solely in terms of physical dimensions of the vessel and the installed power of its propulsion engine. No account is taken of the utilisation of power on the vessel. Similarly indices of total fleet ‘capacity’ are maintained on a basis of reference to total displacement or installed propulsion power and thus fail to take account of any factors which might alter the relationship between these parameters and actual performance of the fleet. In either case, a means of accurately modifying the traditional methods of assessing performance of individual vessels should provide an option of more accurately controlling the changes in structure of the fleet. This report has been produced from a scanned original and may therefore contain some formatting and other inaccuracies. In cases where this affects the technical content, a paper copy of the original report can still be obtained from Seafish.

Publication Reference No.

SR417

Publication date

01 June 1992