%0 Journal Article %T Theoretical grounds for determining optimal trim of river-sea vessels %A Ershov, A.. %A Mishenko, V.. %K optimal trim of the vessel, theoretical foundations, use of optimal trim to improve seaworthiness, medium resistance against ship propulsion, wave height %J Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies %D 2021 %N %P 11 %I Astrakhan State Technical University