CII

The Carbon Intensity Indicator (CII) is the IMO's mandatory operational rating of a ship's carbon efficiency, effective from January 2023. Each ship 5,000 GT and above receives an annual rating from A (major superior) to E (inferior) based on actual CO2 emissions per cargo capacity per nautical mile sailed.

Vessels rated D for three consecutive years, or E for one year, must develop a Corrective Action Plan to bring CII back to C or better. CII is becoming a major commercial factor: charterers increasingly prefer A/B-rated tonnage; lenders may impose CII covenants; insurers may price by rating.