MARPOL Annex VI - CII Rating by Year
Calculate attained CII and the A–E rating band for a given calendar year - the operational carbon-intensity check introduced 2023-01-01.
Attained CII
5.36gCO₂/dwt·nm
Required CII
3.71gCO₂/dwt·nm
CII rating
E
Formula, assumptions, and limits
Three-year D rating → forced SEEMP corrective action. Reference line uses bulk-carrier coefficients; other segments per MEPC.337(76). Rating bands A-E fixed per ship type.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Annual fuel consumption | t/yr | IMO DCS | |
| Fuel carbon factor | tCO₂/tfuel | MEPC.364(79) | |
| Deadweight | dwt | tonnage certificate |