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Energy Efficiency Existing Ship Index (EEXI)


EEXI (Energy Efficiency Existing Ship Index) 

The Energy Efficiency Existing Ship Index (EEXI) is part of the technical approach taken by IMO to improve the operational efficiency of existing ships. In the quest to achieve GHG reduction targets and eventually make shipping Carbon Neutral, the International Maritime Organization (IMO) has developed this new design index extension of EEDI for existing ships that were built before 2013 that considers only the design parameters of the vessels and not the operational factors. 

Overview of MARPOL Amendments  

The IMO has adopted amendments to Annex VI of the MARPOL convention during the 76th session of the Marine Environment Protection Committee (MEPC 76) held in June 2021. 

These amendments are in line with the IMO GHG strategy of reducing the carbon intensity of shipping to at least 40% by 2030 & 70% by 2050 compared to 2008 levels and require ships to incorporate a technical and operational approach to reduce carbon intensity and total GHG emissions. 

What does it mean for Ships operators? 

Before the shipping industry can switch to alternate low-carbon fuels, the ships will have to comply with the mandatory EEXI regulations. The easiest way to attain compliance is by limiting the power of engines, but at the same time the ships should not go below an optimum speed which may have an adverse effect of increased overall fuel consumption and carbon emissions. Hence the ships might have to choose a combination of Engine Power Limiter and cost-intensive Energy saving devices to improve the EEXI of ships, which requires early action to evaluate the most cost-effective compliance options. 

To which ships does it apply? 

EEXI is a mandatory requirement applying to ships above 400 GRT trading in international waters that fall under the existing survey and certification scheme as per MARPOL Annex VI regulation 19, like EEDI, except for the following 
  • Ships operating only in Flag’s national waters. 
  • Ships not propelled by mechanical means 
  • To Platforms including FPSOs and FSUs and Drilling rigs. 
  • Ships with non-conventional propulsion apart from Cruise passenger ships with electric propulsion and LNG carriers. 

Regulatory guidelines for EEXI 

1. Guidelines on Method of calculation of the attained EEXI. 

Attained EEXI is the measure of Ships’ energy efficiency and is measured in gm CO2/ t.nm. EEXI uses the same formula as attained EEDI according to resolution MEPC.308(73), amended by resolution MEPC.322(74). It provides information in detail on the calculation of parameters that are more often difficult to fetch for the existing ships.  

2. Guidelines on the survey and certification of the EEXI.

An administration or a Recognized Organization (RO) duly authorized by it will conduct the survey and certification of EEXI. An EEXI technical file is to be prepared by the ship containing necessary information as adopted during MEPC 76 except for EEDI compliant ships where attained EEDI is less than the required EEXI. In case attained EEXI complies with the required EEXI, a new IEE Certificate will be issued indicating attained and required EEDI.

3. Guidelines on Shaft / Engine power limitation system to comply with the EEXI requirements and use of power reserves. 

The purpose of these Guidelines is to provide information on the use of Engine Power Limitation or Shaft Power Limitation to improve the EEXI. Ships should prepare an Onboard Management Plan for SHaPoLi / EPL, which should be verified by the administration or an RO. 

Ships that already have EEDI technical file. 

  • For vessels with attained EEDI value satisfy the current required EEXI, there is no need to prepare an EEXI technical file, and the ship complies with the EEXI requirements. 
  • For ships which attained EEDI file does not satisfy the required EEXI, an EEXI technical file is to be prepared following the guidelines laid by MEPC. 

When will EEXI come into force? 

The EEXI has been formally adopted at the MEPC 76 session held in June 2021. Ships will need to show compliance by the first International Air Pollution Prevention (IAPP) annual, intermediate, or renewal survey after 1st January 2023. 

What can Verifavia Shipping do for Ship operators?

Verifavia Shipping is the world’s leading independent verifier for carbon emissions in shipping and aviation, we have the required expertise and skillset to perform EEXI calculations for your ships using various techniques outlined in the regulation, including calculation of the Engine Power Limiter required and the identification of options available to reach cost-effective compliance. We can also prepare the EEXI technical files and Onboard Management Manual for shipping operators.

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Please contact us for further information and collaboration
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