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Which capacity metric applies under EEDI, EEXI, and CII differs by ship type and regulation.
Decision table
| Ship type | EEDI / EEXI | CII |
|---|
| Bulk carrier | DWT | DWT |
| Oil tanker | DWT | DWT |
| Container ship | DWT | DWT |
| LNG / Gas carrier | DWT | DWT |
| General / refrigerated cargo | DWT | DWT |
| Ro-Ro cargo | DWT | GT |
| Ro-Ro vehicle carrier (PCTC) | DWT | GT |
| Ro-Pax | DWT | GT |
| Cruise ship | GT | GT |
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|
| $DWT$ | Deadweight tonnage | t | stability booklet |
| $GT$ | Gross tonnage | - (dimensionless) | tonnage certificate |
Sources
- IMO MEPC.231(65) / MEPC.328(76) - EEDI bases.
- IMO MEPC.337(76) - CII bases.