Poseidon Principles for Marine Insurance

The Poseidon Principles for Marine Insurance are a voluntary framework that lets marine hull and machinery insurers measure and disclose the carbon intensity of their underwriting portfolios against IMO decarbonization trajectories. Six insurers launched the framework on 15 December 2021, adapting the 2019 Poseidon Principles for ship finance to the insurance side. Signatories collect each insured vessel’s IMO data, compute an Annual Efficiency Ratio, and report annual climate alignment relative to the IMO trajectory. The framework is administered by the Poseidon Principles for Marine Insurance Association and produces an annual disclosure report. It carries no penalty, the lever is transparency and peer benchmarking.