Attained AER (Annual Efficiency Ratio) vs required benchmark - precursor metric to CII.
Formula
$$ AER = \frac{\sum F_i C_F \cdot 10^6}{DWT \cdot D} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $F_i$ | Fuel type i consumption | t | IMO DCS |
| $C_F$ | Fuel CO₂ factor | tCO₂/tfuel | MEPC.364(79) |
Sources
- MEPC.337(76) / Poseidon Principles.