Technical Update – June 2021
Services pertinent to EEXI – CII compliance


Amendments to MARPOL Annex VI: finding the best way to comply.

The International Maritime Organization (IMO) has recently decided to reduce the carbon intensity of international shipping. In this frame, the following amendments to MARPOL VI, were adopted during MEPC 76, in June 2021:

  • Implementation of specific technical measures to reduce carbon intensity, as prescribed by the new Energy Efficiency Existing Ship Index (EEXI)
  • Specification of operational carbon intensity reduction measures, as prescribed by the new operational Carbon Intensity Indicator (CII)

The integrated new approach thus includes both technical and operational measures.

Energy Efficiency Existing Ship Index (EEXI) Attained and Required

It is mandatory to calculate the attained Energy Efficiency Existing Ship Index (EEXI) for all ship types of 400 GT and above. This value should not exceed the required value of EEXI, to be calculated following the guidelines of the new regulation. A final EEXI Technical file should be prepared for each vessel and submitted to Flag or RO, leading, after an onboard survey, to the issuance of a new International Energy Efficiency Certificate (IEEC). Ships should be EEXI-compliant by the first survey of the IEEC on or after January 1st, 2023.

Ship_EEXI_Energy Efficiency Technologies -A
Ship-CII - Additional Features
Ship-CII - Effect of Average speed
Ship_EEXI_Sofware at a glance
Ship_EEXI_Energy Efficiency Technologies -B-C
Ship_EEXI_Statistical Analysis
Ship-CII - Main Features

Annual operational Carbon Intensity Indicator (CII) – CII rating  

All ships of 5,000 GT and above will be subjected to the calculation of the annual operational Carbon Intensity Indicator (CII), which will determine the required carbon intensity reduction on an annual basis.

The attained CII will be recorded in the amended Ship Energy Efficiency Management Plan (SEEMP) and must be approved by the Flag or RO. Submission of an alternative action plan will be mandatory for low-rated ships, in order to comply with the required level of carbon intensity rating.


A. Standard Services

  • Calculation of current EEXI
  • Calculation of required EEXI
  • Calculation of suggested Engine Power Limitation (EPL) / Shaft Power Limitation (SHaPoLi), to achieve required EEXI, considering requirements for minimum propulsion power
  • Calculation of suggested new maximum speed, based on the suggested limited MCR
  • Calculation of Attained EEXI based on onboard EPL / SHaPoLi installation (limited MCR)
  • Preparation of EPL / SHaPoLi Onboard Management Manual (OMM)
  • Preparation of final EEXI Technical File

B. Optional Services (Software’s additional functions evaluating vessel’s future competitiveness)

  • Calculation of Vmax after EPL, at Scantling, Design, Light ballast & Heavy ballast draughts (at the limited MCR).
  • Vessel’s Speed profile Detailed Assessment / Vessel’s performance ( after EPL installation) per draught and speed

C. Additional Services

  • Evaluation of Energy Efficiency Technologies (EETs) – EEXI Improvement options / Calculation of effects of innovative Energy Efficiency Technologies (Categories (A), (B) & (C)) in the context of IMO MEPC. 1/Circ.815
  • CFD calculations in the frame of Power – Speed curve estimation (CFD Studies for Energy Saving Devices)
  • Bow, Propeller & Rudder Optimization



A. CII assessment

  • Preliminary ship CII assessment based on IMO verified DCS data
  • CII forecast for years 2023 – 2026, (vessel’s rating)
  • Effect of Average Vessel Speed Reduction on CII
  • CII compliance forecast

B. CII decision support

  • Link between EEXI and CII
  • Preliminary evaluation of potential measurers (operational and technical) for improving the CII rating
  • Assess the technoeconomic impact of selected measures as per client’s request.

C. CII verification

  • Methodology to calculate the attained annual CII. Report to the Administration/RO.
  • Annual operational CII for the next year (for D rated ships) and for the three following years (for E rated ships)
  • Enhanced SEEMP development and submission to the Administration/RO
  • Management activities for CII self-evaluation (internal audits support)

Responding to the adopted mandatory IMO requirements, M&C Group and SHIPREALITY have joined forces to offer quality services to shipping companies and support them in implementing pragmatic solutions for ship energy efficiency.