cbDIST - CO₂ per capacity nautical mile
Generic capacity-normalised operational CO₂ intensity - use when the appropriate capacity basis is neither deadweight nor gross tonnage, or when comparing across ship types.
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Capacity-normalised CO₂ intensity | g CO₂ / (cap·nm) | |
| Mass of fuel burned | t | |
| CO₂ conversion factor for fuel | t CO₂ / t fuel | |
| Commercial capacity basis (DWT, GT, TEU, lane-m, reefer plugs…) | varies | |
| Distance sailed in the reporting period | nm | |
| Unit conversion tonnes → grams |
Source: IMO MEPC.336(76) - operational CII framework; IMO MEPC.364(79) - Cf conversion factors
In short
Generic capacity-normalised CO₂ intensity for ships - cbDIST for custom capacity bases like TEU, lane-metre, or reefer plug.