CII – Carbon Intensity Indicator

CII overview

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Overview of the Carbon Intensity indicator (CII)

Regulators and other stakeholders in the maritime industry are intensifying their efforts to cut greenhouse gas (GHG) emissions from shipping. The IMO, as the international regulatory body, set a Greenhouse Gas Reduction Strategy in 2018. One of the goals is to achieve a reduction in carbon intensity of 40% by 2030 compared to the 2008 level. The target is to reduce GHG emissions by improving vessels’ energy efficiency as well as introducing new technologies and low or zero-carbon fuels. 

In June 2021, the IMO adopted extensive new CO2 regulations applicable to existing ships. The Energy Efficiency Existing Ship Index (EEXI) addressing the technical efficiency of ships, the Carbon Intensity Indicator (CII) rating scheme addressing the operational efficiency, and the enhanced Ship Energy Efficiency Management Plan (SEEMP) addressing the management system.

MA_Potential exposure to carbon risk

The IMO’s Carbon Intensity Indicator (CII)

From 2023, the CII requirements will take effect for all cargo, RoPax and cruise vessels above 5,000 GT and trading internationally.  

The CII measures how efficiently a ship transports goods or passengers and is given in grams of CO2 emitted per cargo-carrying capacity and nautical mile. The ship is then given an annual rating ranging from A to E, whereby the rating thresholds will become increasingly stringent towards 2030. 

While the EEXI is a one-time certification targeting design parameters, the CII addresses the actual emissions in operation. 

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Related webinars

WEBINAR on demand: EEXI and CII calculations - DNV's way forward

Watch the recording and download the slide deck

WEBINAR on demand: MEPC 76 in focus – CO2 emissions regulations adopted

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WEBINAR on demand: LNG as ship fuel – where are we and what comes next? (May 2021)

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WEBINAR on demand: EEXI – what you need to know (January 2021)

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Related links

EEXI – Energy Efficiency Existing Ship Index page

Covering implementation, calculation, FAQs, services and more

EU MRV and IMO DCS page

All information and services that help you to comply with the EU-MRV and IMO-DCS directives hassle-free

Decarbonization in shipping page

Regulatory overview, services and more

IMO’s work to cut GHG emissions from ships

Visit the IMO webpage