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What is CII?

Published in Shipping Emissions 2 mins read

The Carbon Intensity Indicator (CII) is a crucial measure in the maritime industry. It assesses a ship's operational carbon efficiency.

Understanding the Carbon Intensity Indicator (CII)

The CII provides a standardized way to measure how efficiently a ship transports goods or passengers. It is expressed in grams of CO2 emitted per cargo-carrying capacity and nautical mile. This metric helps quantify the carbon footprint of individual vessels.

How CII Works:

  • CO2 Emissions: The total amount of carbon dioxide emitted by the ship during its operation is the numerator.
  • Cargo Capacity and Distance: The denominator is calculated by multiplying the ship's cargo-carrying capacity by the distance it has traveled (nautical miles).

Why is CII Important?

  • Transparency: The CII provides a clear, comparable measure of a vessel's carbon performance.
  • Regulation: It is used by regulatory bodies to assess and enforce emissions standards within the shipping industry.
  • Improvement: Shipping companies can use CII data to identify areas for efficiency improvements, such as optimizing routes, adopting energy-efficient technologies, or using alternative fuels.
  • Incentives: A lower CII rating implies more efficient operations and can provide cost savings for shipping companies.

Example of CII Calculation:

Let's imagine a ship travels 1000 nautical miles while carrying 5000 tons of cargo. If this journey results in 100,000 grams of CO2 emissions, then the CII would be calculated as:

CII = (100,000 grams CO2) / (5000 tons * 1000 nautical miles) = 0.02 grams CO2 / ton-nautical mile

This calculation shows how much CO2 is emitted per ton of cargo transported over each nautical mile.

Key Features of CII:

  • Standardized metric for measuring a ship's carbon footprint.
  • Calculated using grams of CO2 emissions relative to cargo capacity and distance.
  • Used for monitoring, regulation, and efficiency improvements within the shipping industry.

In conclusion, the Carbon Intensity Indicator is a vital tool for monitoring and improving the environmental performance of ships by measuring how efficiently they transport goods or passengers.

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