TY JOUR TI Transport energy efficiency and economic principles of maritime navigation KW sea vessel KW operational speed KW energy efficiency KW rating KW carbon intensity KW freight rates KW tramp shipping JO Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies AU Moskalenko, V.. AU Moskalenko, M.. AU Lugovets, A.. PY 2024 IS 2024 PB Astrakhan State Technical University