Short-sea passenger ferries share the Ro-Pax reference line under IMO CII.
Formula
$$ \text{CII}_\text{required} = 7540 \cdot \text{GT}^{-0.587} \cdot (1 - Z) $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $GT$ | Gross tonnage | - | ITC-69 |
| $Z$ | Annual reduction | fraction | MEPC.338(76) |
Shares Ro-Pax d-boundaries (0.72, 0.90, 1.12, 1.41).
Sources
- IMO MEPC.337/338/339(76).