TY JOUR TI Evaluation of economic efficiency of shipping systems for shipping oil-containing waters KW cleaning system KW mathematical model KW technical and economic indicators KW cleaning cost KW economic analysis KW operating costs KW deep cleaning KW environmental and economic effect JO Operation of Maritime Transport AU Khodjaev, S.S. AU Strakhova, N.A. PY 2020 IS PB Budget Educational Institution of Higher Education “Admiral Ushakov State Maritime University”