TY JOUR TI Offshore dynamically positioned vessels low GHG strategy approach KW dynamic positioning systems (DP system) KW sustainability KW shaft generators KW Onboard DC-Grid KW energy storage system KW ship energy efficiency management KW batteries KW greenhouse gases (GHG) reduction KW zero emission KW IMO KW MARPOL JO Operation of Maritime Transport AU Ignatenko, A.V. AU Kravchenko, N.A. AU Epikhin, A.I. PY 2021 IS PB Budget Educational Institution of Higher Education “Admiral Ushakov State Maritime University”