IMO compliant marine fuel refers to bunker fuels that meet the International Maritime Organization's (IMO) sulfur emission regulations, primarily under MARPOL Annex VI. The most significant rule is the 2020 global sulfur cap, limiting sulfur content in marine fuels to 0.50% m/m (previously 3.50% outside Emission Control Areas). In Emission Control Areas (ECAs) such as the Baltic Sea, North Sea,...