Formula (lookup)
$$ Z(y, \text{type}, \text{Capacity}) = Z_\text{table}[y][\text{type}][\text{size band}] $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $Z$ | Phase reduction factor | % | MEPC.328(76) Table 1 |
| $y$ | Phase (0, 1, 2, 3) | - | contract-year → phase mapping |
| $type$ | Ship type | - | MEPC.328 |
| $size band$ | Capacity bucket | DWT or GT | MEPC.328 |
Phase timeline
| Phase | Window | Typical Z |
|---|---|---|
| 0 | 2013–2014 | 0 % |
| 1 | 2015–2019 | 10 % |
| 2 | 2020–2024 | 20–30 % |
| 3 | ≥ 1 Apr 2022 | 5–50 % |
Sources
- IMO MEPC.328(76) Table 1.