CII calculator › Combination carrier
Combination carrier CII calculator
Work out the attained and required Carbon Intensity Indicator (CII) of a combination carrier and its A–E rating for any year from 2023 to 2030. Capacity for this ship type is deadweight tonnage (DWT), so the CII is in grams of CO₂ per DWT·nautical mile.
Required CII by ship size, 2023–2030
Required CII in g CO₂/(DWT·nm) for example sizes. The required value tightens each year by the reduction factor Z.
| DWT | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 |
|---|---|---|---|---|---|---|---|---|
| Z | 5% | 7% | 9% | 11% | 13.625% | 16.25% | 18.875% | 21.5% |
| 40,000 | 6.67 | 6.53 | 6.39 | 6.25 | 6.07 | 5.88 | 5.70 | 5.52 |
| 80,000 | 4.34 | 4.25 | 4.15 | 4.06 | 3.94 | 3.82 | 3.70 | 3.58 |
| 120,000 | 3.37 | 3.30 | 3.23 | 3.16 | 3.06 | 2.97 | 2.88 | 2.78 |
Reference line
The 2019 reference value is a × Capacity−c with these parameters from IMO resolution MEPC.353(78), Table 1:
| Size | Capacity used | a | c |
|---|---|---|---|
| All sizes | DWT | 5119 | 0.622 |
Rating boundaries
Each boundary is the required CII multiplied by a factor from MEPC.354(78), Table 1. A ship is rated A up to the superior boundary, B up to the lower, C up to the upper, D up to the inferior, and E above it.
| Size | Superior (A|B) | Lower (B|C) | Upper (C|D) | Inferior (D|E) |
|---|---|---|---|---|
| All sizes | 0.87 | 0.96 | 1.06 | 1.14 |
See how the CII is calculated.