Slow steaming application for short-sea shipping to comply with the CII regulation

Slow steaming is an effective operational measure that reduces fuel consumption and thus emissions on board. With the Carbon Intensity Indicator (CII) regulation coming into force in 2023 from International Maritime Organization (IMO), ships will have to reduce their CO2 even more. The practice of slow important comply with this regulation. In study, real voyage data a general cargo ship was used. changes consumption, CO2, CH4, N2O, BC emissions, 20-year global warming potential (GWP20), 100-year (GWP100) were analysed under different scenarios (75%, 38%, 27%, 19% main engine load), expenses cost-benefit ratio calculated. At 38% load, 31.5% less released than at 75% load. 27% emission reduction 40.6% 50.1%, respectively. target 40% by 2030 50% 2050 compared 2008 levels IMO Initial GHG Strategy achieved steaming. As decreased due application steaming, had positive impact ship's CII rating it remained A without further action. Nevertheless, remains amount varies depending rate three scenarios, shows environmental each not same. results economic analysis show operating costs increase decrease when travel time extended result, total up 23.3%.