CII - Carbon Intensity Indicator Guidelines

Category

IMO Conventions

Format

Official text on the issuing body’s site

Listed

26 September 2025

Access

Free

The terms this document rests on, as the glossary and the dictionary define them.

The live desks on The Maritime read alongside this instrument.

• FuelEU Maritime Regulation Summary

  Summary of the FuelEU Maritime regulation requiring a progressive reduction in GHG intensity of energy used on board ships calling at EU ports from 2025.

  Industry GuidelinesOfficial source Official source
• MARPOL 73/78 - International Convention for the Prevention of Pollution from Ships

  The main international convention covering prevention of pollution of the marine environment by ships from operational or accidental causes.

  MARPOLOfficial source Official source
• MARPOL Annex VI - Regulations for the Prevention of Air Pollution from Ships

  Sets limits on sulphur oxide and nitrogen oxide emissions from ship exhausts and prohibits deliberate emissions of ozone depleting substances.

  MARPOLOfficial source Official source

• Ballast Water Management Convention

  Aims to prevent the spread of harmful aquatic organisms from one region to another by establishing standards and procedures for the management and control of ships' ballast water and sediments.

  Official source Official source
• COLREGS - Convention on the International Regulations for Preventing Collisions at Sea

  Sets out the navigation rules to be followed by ships at sea to prevent collisions.

  Official source Official source
• EEXI - Energy Efficiency Existing Ship Index Technical File

  Technical guidelines for the calculation of the attained Energy Efficiency Existing Ship Index (EEXI) for ships of 400 GT and above.

  Official source Official source
• Hong Kong Convention - Ship Recycling

  Aimed at ensuring that ships being recycled after reaching the end of their operational lives do not pose any unnecessary risk to human health and safety or to the environment.

  Official source Official source
• IMO GHG Strategy - Initial Strategy Overview

  Overview of the IMO initial strategy to reduce GHG emissions from ships by at least 50% by 2050 compared to 2008 levels, with a vision to phase them out entirely.

  Official source Official source
• Load Lines Convention - International Convention on Load Lines

  Ensures that ships have sufficient freeboard and adequate stability for safe operation.

  Official source Official source