The SAT has adopted the same metrics as the EU Taxonomy which are also used by IMO, however it goes beyond what is offered by EU by providing the long-term decarbonization pathway. The EU Taxonomy has specified such criteria will be valid until 31 December 2025, while the SAT has the thresholds until 2050.

The SAT and EU frameworks employ fundamentally different metrics for assessing maritime sustainability.

The EU’s requirements align with the IMO’s standards, focusing on metrics such as the Energy Efficiency Design Index (EEDI), Energy Efficiency Existing Ship Index (EEXI), and fuel energy intensity. In contrast, the SAT is structured around the CBI trajectory which is based on Energy Efficiency Operational Indicator (EEOI)/ Annual Efficiency Ratio (AER), both of which are operational energy efficiency indexes.

 

[Updated in Oct 2025]