The CII (Carbon Intensity Indicator), as part of the global IMO Green House Gases Strategy/Regulation, describes a ship’s carbon efficiency. It is measured in terms of grams of CO2 emitted per cargo-carrying capacity per nautical mile. The CII is an evolving operational indicator, unlike EEXI and EEDI, which are related to the ship’s design.
The amendments to MARPOL Annex VI relating to CII certification comes into effect from 1st January 2023. Shipowners shall complete their first CII reporting in 2023, with the first rating allocated in 2024. The requirements will cover ships of 5,000 GT and above. Vessels impacted are also required to report on fuel consumption as a part of the IMO Data Collection System (DCS).
The rating thresholds will tighten each year through the application of annual reduction factors. This will require an 11% CO2 reduction by 2026 compared to the reference values of 2019.