(www.MaritimeCyprus.com) Pursuant to the upcoming amendments to MARPOL Annex VI, Appendix IX, adopted via MEPC.395(82), significant enhancements to fuel oil consumption reporting will come into force on 1 August 2025. These changes form part of the IMO’s broader strategy to improve transparency, accuracy, and accountability in maritime emissions reporting.
Under the revised requirements, all vessels subject to the Data Collection System (DCS) will be obligated to collect and report annual fuel consumption data in a more granular and disaggregated format. Specifically, the data must be categorized by consumer type—including, but not limited to, main engines, auxiliary engines, and boilers—as well as by fuel type (e.g., HFO, MGO, LNG, etc.). Additionally, fuel consumption must be reported for both underway and not underway operational modes, offering a more precise profile of vessel energy usage patterns throughout the year.
To comply with these enhanced reporting obligations, vessel owners, operators, and managers must take proactive steps to ensure their fleets are equipped with the necessary systems and instrumentation. In particular, vessels delivered before 1 August 2025 must be retrofitted with flowmeters or equivalent approved fuel measurement systems, capable of providing the high-resolution, real-time data required to meet the revised accuracy thresholds.
Furthermore, the Ship Energy Efficiency Management Plan (SEEMP), Part II must be updated to reflect these new reporting procedures and technologies, and be submitted for verification and approval by the relevant classification society or recognized organization no later than 1 January 2026.
Advanced onboard monitoring solutions, are critical enablers of compliance. These technologies provide accurate and continuous measurements of fuel consumption, which not only satisfy regulatory requirements but also support data-driven operational improvements. By analyzing this data, operators can identify and rectify inefficiencies—such as suboptimal engine loads, unnecessary generator usage during port stays, or excessive transit speeds—that contribute to increased fuel burn and emissions.
In addition to compliance and efficiency gains, robust fuel monitoring plays a pivotal role in assessing the performance of green technologies such as wind-assisted propulsion systems, air lubrication systems, or hybrid-electric auxiliaries. The ability to attribute fuel savings to specific systems or retrofits enhances the credibility of environmental claims and supports future investment decisions.
Moreover, with the gradual expansion of market-based measures such as the EU Emissions Trading System (EU ETS) to the maritime sector, precise and verifiable fuel consumption data has become a financial imperative. Accurate tracking allows operators to forecast emissions exposure, optimize voyage planning, and reduce the cost burden associated with carbon allowances.
In conclusion, the forthcoming amendments to MARPOL Annex VI significantly elevate the standards for fuel consumption monitoring and reporting. Stakeholders are advised to act promptly to assess fleet readiness, select appropriate measurement technologies, and revise internal reporting procedures to ensure seamless compliance by the stipulated deadlines.
The IMO RESOLUTION MEPC.395(82) can be downloaded below:
