Effects of the Carbon Intensity Index Rating System on the Development of the Northeast Passage

For many years, the Suez Canal (also known as Route) has been main route connecting Europe and Asia. However, compared with Route, Northeast Passage could save up to 41% of journey. The ship carbon intensity index (CII) rating system International Maritime Organization (IMO) came into effect in 2023. This study took an existing bulk carrier on Europe–Asia example calculate attained CII values at different sailing speeds. It was found that, regardless external factors, when speed dropped from 14.4 knots (85% maximum continuous (MCR)) 12.6 (55% MCR), corresponding value decreased 6.48 g/ton·nm 5.19 g/ton·nm. Therefore, key factor influencing value, it independent shipping distance. In addition, ship’s output power between 85% MCR 75% MCR, for every 5% decrease its would by 0.13 g/ton·nm, fuel consumption amount 1 ton/day. sailed 55% even more, 0.26 be reduced 100% 1.5 ton/day, resulting a 50% saving effect. obtain better rating, optimal should set according wave wind strengths. although slow-speed is most efficient factor, number days also extended. Through ratio created dividing distance whether benefit balancing schedules judged. outcome indicated that lower than result more balanced schedule. Compared 2019, ships through 2021 increased significantly 132%, average dead weight tonnage rose 18,846 tons 23,736 tons. implementation reduction policy continue develop toward trend large-sized vessels steady increase number.