Greenhouse gas emissions reduction

In addition to regulations on new ships to meet an Energy Efficiency Design Index (EEDI), the International Maritime Organization (IMO) has further adopted amendments to MARPOL Annex VI to reduce greenhouse gas emissions from ships in operation.

The new requirements are limiting the use of power of ships in operations – Energy Efficiency Existing Ship Index (EEXI) – and define certain requested carbon intensity levels based on which ships’ efficiency is rated via a Carbon Intensity Index (CII).

INTERTANKO has provided advice and guidance to Members to assist them in EEXI compliance and continues to provide assistance to Members on the complex application of the CII requirement so they can ensure a correct calculation of the CII attained value and of the CII rating. The IMO is currently considering the possible introduction of Phase 4 level limits.

Contact

Gil-Yong Han

Senior Manager Technical
e: gilyong.han@intertanko.com
t: +44 20 7977 7024

Wong Kai Cheong

Senior Technical Manager
e: Wong.KaiCheong@intertanko.com
t: +65 6333 4007

Dragos Rauta

Technical Consultant
e: dragos.rauta@intertanko.com
t: +47 22 122 650

Latest on Greenhouse gas emissions reduction

4 July 2025

BSM shares data from over 100 vessels in INTERTANKO’s GHG Benchmarking Tool

INTERTANKO’s GHG Benchmarking Tool empowers Members to evaluate the performance of their vessels and fleets against anonymised data from the broader... MORE

27 June 2025

Outcomes of IMO MSC 110

The 110th session of the International Maritime Organization’s (IMO) Maritime Safety Committee (MSC) was held between 18–27 June and Chaired... MORE

13 June 2025

INTERTANKO’s Council support for decarbonisation pathways and a single global framework

In the wake of the IMO’s Marine Environment Protection Committee (MEPC 83) meeting and the draft agreement for a global... MORE

13 June 2025

Member discount secured: CO2 Shipping & Terminals Conference - 17 June, London

The CO2 Shipping & Terminals Conference is taking place on 17 June at the Hilton Waldorf, Aldwych, London and promises a focused... MORE

6 June 2025

FuelEU: Report on FuelEU calculation methodologies

A FuelEU workstream under the European Commission European Sustainable Shipping Forum (ESSF) Sub-Group on Sustainable Alternative Power for Shipping (SAPS)... MORE

View Archive

Key Resources

11 April 2025

MEPC 83: Outcomes of GHG Working Group

The International Maritime Organization GHG Working Group (GHGWG) was formed at MEPC 83 to continue the discussions from ISWG-GHG 19,... MORE

6 September 2024

Guidance on EU ETS Charterparty Considerations

INTERTANKO has updated its guidance on EU ETS Charterparty Considerations which was first published in December 2024. The issues arising from... MORE

19 October 2023

Key information relating to MRV, EU ETS and FuelEU

MRV On 10 May 2023, the European Union published the 2023 amendments to the EU Regulation (EU) 2015/757 ‘MRV: Monitoring,... MORE

1 September 2023

Key information on International Maritime Organisation (IMO) GHG emissions reduction regulations from international shipping

This page presents information on International Maritime Organisation (IMO) GHG emissions reduction regulations from international shipping. If you would like... MORE

6 January 2023

Carbon Intensity Indicator (CII) Calculators – Updated INTERTANKO guidance available

INTERTANKO has updated its short guidance document explaining how the attained Carbon Intensity Indicator (CII)/Annual Efficiency Ratio (AER) values are calculated.... MORE