Poseidon Principles Climate Alignment

Bank-driven climate-alignment metric: percentage deviation of a ship's AER from the IMO Poseidon Principles decarbonisation trajectory. Positive = ship is below the trajectory (aligned); negative = above (lagging).

PortIndexFinance

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{Alignment} = \left(\frac{\text{AER}_\text{trajectory} - \text{AER}_\text{attained}}{\text{AER}_\text{trajectory}}\right) \times 100

Symbol	Meaning	Unit
$\text{AER}_\text{attained}$	Ship's Attained AER	g CO₂ / (dwt·nm)
$\text{AER}_\text{trajectory}$	Trajectory AER for ship type / size / year	g CO₂ / (dwt·nm)

Source: Poseidon Principles - *signatories' portal*; IMO Resolution MEPC.336(76) - AER / CII framework

In short

Compute a ship's climate-alignment score against the Poseidon Principles decarbonisation trajectory.

Learn the theory Shipping Climate Finance and GHG Ratings