Per-ship energy-efficiency plan, mandatory since 1 January 2013.
Formula
$$ p_\text{combined} = 1 - \prod_i (1 - p_i) $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $p_\text{combined}$ | Combined fraction saved across all measures | fraction | result |
| $p_i$ | Fractional saving of measure $i$ | fraction | operator estimate |
Savings compound multiplicatively - two 10 % measures give 19 %, not 20 %.
Sources
- MARPOL Annex VI Regulation 22.
- IMO MEPC.282(70) - 2016 SEEMP Guidelines.