Class 1 (Chief Engineer) Engineering Management 📅 Feb 2026

Exam Question

(a) Discuss the concept of CII (Carbon Intensity Indicator) as adopted in MARPOL, and the commercial impact of CII in shipping business. (10)

(b) Discuss shortcomings of the current CII concept being faced by the industry and remedial measures adopted. (6)

Reference Answer

### (a) Concept of CII and Its Commercial Impact
#### **1. Concept of Carbon Intensity Indicator (CII)**
The Carbon Intensity Indicator (CII) is a mandatory operational measure adopted by the International Maritime Organization (IMO) under MARPOL Annex VI, which came into effect on 1st January 2023. It serves as a key tool in the IMO's strategy to reduce greenhouse gas (GHG) emissions from shipping.
* **Objective**: The primary goal of CII is to drive a continuous, year-on-year improvement in the operational energy efficiency of existing ships, aligning the industry with the IMO's target of a 40% reduction in carbon intensity by 2030, compared to 2008 levels.

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