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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

Ship performance

Ship's Attained AERg/(dwt·nm)

Trajectory target

Trajectory AER target for ship type + size + yearg/(dwt·nm)From the Poseidon Principles secretariat's annual trajectory tables.

Alignment %

-4.0%

Marginally lagging

Formula, assumptions, and limits

The Poseidon Principles signatories (banks with $220B+ shipping loan exposure) report a portfolio-weighted alignment score every year. Ships above the trajectory pull the bank's score into negative territory.