Exam Question
Explain the concept of CII rating and critically discuss the role of measuring metrics of AER and EEOI. What are the measures required to be taken by the vessel to improve its CII ratings. (16)
Class 1 (Chief Engineer)
Engineering Management
📅 Apr 2025
Reference Answer
### 1. Concept of Carbon Intensity Indicator (CII)
The Carbon Intensity Indicator (CII) is a mandatory operational measure established by the International Maritime Organization (IMO) under MARPOL Annex VI, regulations 26, 27, and 28. It applies to ships of 5,000 GT and above. The primary goal of the CII is to measure and regulate the operational carbon efficiency of a vessel, driving continuous improvement towards the IMO's goal of reducing shipping's carbon intensity by 40% by 2030, compared to 2008 levels.
**Core Concept:**
CII quantifies how efficiently a ship performs its transport work. It is expressed as the mass of CO2 emitted per unit of transport work.
The Carbon Intensity Indicator (CII) is a mandatory operational measure established by the International Maritime Organization (IMO) under MARPOL Annex VI, regulations 26, 27, and 28. It applies to ships of 5,000 GT and above. The primary goal of the CII is to measure and regulate the operational carbon efficiency of a vessel, driving continuous improvement towards the IMO's goal of reducing shipping's carbon intensity by 40% by 2030, compared to 2008 levels.
**Core Concept:**
CII quantifies how efficiently a ship performs its transport work. It is expressed as the mass of CO2 emitted per unit of transport work.
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