Understanding the IMO's Carbon Intensity Indicator (CII) Regulation

In an era where environmental sustainability is more critical than ever, the International Maritime Organization (IMO) is stepping up its efforts to reduce greenhouse gas (GHG) emissions from shipping. One of the key measures introduced by the IMO is the Carbon Intensity Indicator (CII) regulation. But what exactly is the CII, and who does it affect? 

What is the Carbon Intensity Indicator (CII)?

The CII regulation is part of the IMO’s broader strategy to enhance the energy efficiency and reduce the carbon footprint of ships. The regulation provides a standardized measure to quantify and control the carbon intensity of vessels, which refers to the amount of CO2 emissions per unit of transport work, such as grams of CO2 per ton-mile.

How is the CII Calculated?

The CII is calculated annually based on the operational data of each ship. This data includes fuel consumption, distance traveled, and the amount of cargo carried. The result is a CII value that indicates the ship's carbon intensity performance for that year.

The CII Rating System

Ships are rated from A to E based on their CII performance:

  • A: Major superior performance
  • B: Minor superior performance
  • C: Moderate performance
  • D: Minor inferior performance
  • E: Inferior performance

A ship that receives a D rating for three consecutive years or an E rating in any single year is required to submit a corrective action plan to improve its rating.

Who Does the CII Regulation Apply To?

The CII regulation applies to all ships above 5,000 gross tonnage (GT) engaged in international voyages. This includes a wide range of vessel types, such as bulk carriers, tankers, container ships, and general cargo ships. In essence, the regulation covers a significant portion of the global merchant fleet, making it a crucial element in the maritime industry's journey towards greener operations.

Implementation and Compliance

The CII regulation came into effect on January 1, 2023, under MARPOL Annex VI. It is a vital part of the IMO’s goal to achieve at least a 40% reduction in carbon intensity by 2030 compared to 2008 levels, and a 70% reduction by 2050.

Ship operators are required to document their annual CII and report it to their flag state. The flag state then verifies the data and issues the ship with a Statement of Compliance. Non-compliance with the CII regulation can result in penalties and restrictions, potentially affecting the ship's ability to operate in certain jurisdictions or ports.

Why is the CII Important?

By mandating the calculation and reporting of the CII, the IMO aims to incentivize the adoption of more energy-efficient technologies and operational practices. This, in turn, helps reduce the overall carbon footprint of the shipping industry, contributing to global efforts to combat climate change.

The CII regulation is not just a regulatory requirement; it's a step towards a more sustainable and environmentally friendly maritime industry. As ship operators and owners work towards improving their CII ratings, the industry as a whole moves closer to achieving significant reductions in GHG emissions, paving the way for a greener future.


Take Action with Carbon One

Navigating the complexities of CII compliance can be challenging, but you don't have to do it alone. Our Carbon Emission Reporting system, Carbon One, is designed to simplify your reporting process and ensure compliance with the latest IMO regulations.

By signing up for Carbon One, you'll benefit from:

  • Accurate Data Management: Seamlessly track and report your vessel's emissions data.
  • Automated Compliance Reports: Generate and submit required reports with ease.
  • Expert Support: Access to a team of experts ready to assist you with any compliance questions or concerns.

Join the growing number of ship operators who are taking proactive steps towards a sustainable future. Sign up for Carbon One today and ensure your fleet stays ahead of the curve in CII compliance.

The CII regulation is a pivotal measure in the IMO’s strategy to reduce GHG emissions from shipping. It applies to a broad range of vessels and aims to improve energy efficiency through a standardized rating system. By understanding and complying with the CII regulation, and leveraging tools like Carbon One, the shipping industry can make substantial strides towards sustainability and environmental stewardship.

Sign Up for Carbon One Now!