%0 Journal Article %T Determination of the drag coefficient of trawls by the hydraulic-mathematical method %A Gaydenok, N.D. %K trawl, water resistance force, friction resistance, pressure resistance, resistance coefficient, Bernulli equation, body contour inversion, local resistances, pres-sure drop, dynamic pressure, boundary layer, calculus of variations, optimal control, Dido problem, Bolts’s Task, multi-criteria problem, Galerkin method %J Fisheries %D 2021 %N 2021 %P 8 %I FSBI "TSUREN"