Shipping Efficiency - A to G GHG Emission Rating

The Shipping Efficiency A-to-G GHG Emissions Rating, an initiative by the Carbon War Room and RightShip, provides a standardized way to measure and compare the environmental performance of the world's existing commercial fleet. Using the familiar European A-to-G energy efficiency scale, each vessel receives a rating based on its theoretical CO2 emissions per nautical mile traveled, with A representing the most efficient ships and G the least. The system covers approximately 70,000 vessels, including container ships, tankers, bulk carriers, cargo ships, cruise ships, and ferries.

The rating is designed to bring transparency to an industry that has historically lacked accessible, comparable emissions data. By applying a consistent methodology across ship types and sizes, the system allows cargo owners, charterers, port authorities, and other stakeholders to make more informed decisions about which vessels they work with based on environmental performance.

For shipping companies, obtaining a rating through ShippingEfficiency.org offers a way to demonstrate their fleet's relative efficiency to customers and partners who are increasingly focused on reducing supply chain emissions. The rating does not certify a minimum standard but rather positions each vessel on a comparative scale, making it a benchmarking tool rather than a pass/fail certification.