CII - Required Line by Year
Required CII for a given ship-type and year - the benchmark used in the A-E rating thresholds.
Required CII
3.71gCO₂/dwt·nm
Formula, assumptions, and limits
Bulker coefficients shown; other ship types have different a/c. 2027+ reduction factors to be revised per IMO MEPC 80 revised GHG strategy. Forced three-year D rating → SEEMP corrective actions.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Ship-type coefficients | - | MEPC.337(76) | |
| Reduction factor | - | MEPC.338(76) |