Extending the possibilities of the original THETIS information system, EMSA designed a purpose-built monitoring, reporting and verification system. This THETIS-MRV system enables companies to work together with accredited verifiers to prepare monitoring plans in a voluntary module and, importantly, to release emission reports and documents of compliance to the European Commission and relevant flag state authorities using the mandatory module. Using the information submitted, the European Commission will publish annual aggregated data per ship covering fuel consumption, CO₂ emissions and average energy efficiency indicators, among others.

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