Applicability: shipowners, ship operators and ship managers.
Amendments to MARPOL Annex VI Appendix IX enter into force on 1 August 2025 that require ships to collect and report additional fuel oil consumption data in a calendar year.
This additional data includes:
- Fuel oil consumption per consumer type and fuel type (including main engines, auxiliary engines etc)
- Fuel oil consumption while not underway per consumer type and fuel type
- Onshore power supplied to the ship
- Laden distance travelled (on a voluntary basis)
- Installation of innovative technologies
- Total transport work
Updates to and Review of the SEEMP Part II
In accordance with MARPOL Annex VI Regulation 5, the ship’s Ship Energy Efficiency Management Plan (SEEMP) Part II will require amendment and review by the flag Administration or Recognised Organisation before the subject ship collects the associated data:
- For existing ships: reviewed before 1 January 2026
- For new ships: reviewed before the ship enters service
Section 7 of MEPC.395(82) sets out the recommended methods to collect this “new”, more granular data related to fuel oil consumption per consumer type. This includes the following methods:
- Using flow meters
- Bunker fuel oil tank monitoring
Lloyd’s Register (LR) understands that in most instances the use of flow meters will be needed to improve the accuracy of data collection.
What shipowners and ship managers should do now
Owners, operators and managers should consider this data collection at an early stage to ensure the necessary equipment and procedures are in place on board for the 1 January 2026 deadline.
Clarification of data collection dates
The IACS has adopted a Unified Interpretation (UI MPC131) which clarifies that additional data should not be collected and reported part way through a calendar year. In addition, the IMO has agreed to the same understanding, which is communicated in MEPC.1/Circ.913 (Guidance on the Application of the Amendments to Appendix IX of MARPOL Annex VI (Resolution MEPC.385(81)).
Collection of data for existing ships after 1 August 2025
Ships that hold a verified SEEMP Part II and are collecting the data within the current MARPOL Annex VI Appendix IX before 1 August 2025, are expected to continue collecting this data after 1 August 2025 until 31 December 2025. This is to ensure that the data collected and reported is consistent throughout the calendar year. In any case, these ships will be required to collect the additional data in the Annex to MEPC.385(81) from 1 January 2026.
Collection of data for new ships after 1 August 2025
For ships that enter service and start collecting data on or after 1 August 2025, it is expected that such ships will collect the data (including the additional data) in the Annex to MEPC.385(81) as they had not collected any data before the amendments entered force.
In this case, LR will request these ships collect the data in the Annex to MEPC.385(81) from the date these ships enter service.
How can we help
Emissions Verifier is LR's digital application for covering the growing needs of the maritime industry in emissions monitoring, reporting, and verification. Find out more about Emissions Verifier here.
For further information
For further information, please contact tso-environmental@lr.org.
This Class News version was updated on May 7, 2025.
