TY JOUR TI Automated calculation of the safety parameter No go Area in the safety problems of shipping when planning for ECDIS KW approximation KW isobath KW security parameters KW cubic spline KW “No go Area” KW NGA KW sigmoid function KW virtual repulsion field JO Operation of Maritime Transport AU Filatov, V.I. PY 2020 IS PB Budget Educational Institution of Higher Education “Admiral Ushakov State Maritime University”