Shares the MEPC.337 tanker reference line with crude tankers - CII regime treats all tankers as one type.
Formula
$$ \text{CII}_\text{required} = 5247 \cdot \text{DWT}^{-0.610} \cdot (1 - Z) $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $DWT$ | Deadweight | t | tonnage certificate |
| $Z$ | Annual reduction | fraction | MEPC.338(76) |
Tanker d-boundaries: d1=0.82, d2=0.93, d3=1.08, d4=1.28.
Sources
- IMO MEPC.337/338/339(76).
- INTERTANKO CII Q&A for product/chemical operators.