In the shipping industry, CII stands for Carbon Intensity Indicator. It is a metric that measures the carbon dioxide emissions produced by ships per unit of transport work, typically expressed as grams of CO2 per tonne-mile.  

This indicator is used to assess the carbon efficiency of the shipping sector and to track progress towards reducing its carbon footprint. The goal of using CII is to incentivize the industry to adopt more sustainable practices and technologies that reduce emissions and improve energy efficiency. 

The CII report provides you with an accurate and comprehensive picture of a ship’s carbon emissions and energy efficiency based on the following input data:  

  • Time at sea  
  • Time at port  
  • Average sailing speed 
  • Fuel consumption per fuel type 
  • Sailed distance 

Keep an effective, yet competitive fleet, while avoiding potential reimbursements for negative CII ratings. 

Technically, the CII Report is retrieving its data from the VRS, which is a web-based application. The connection to the application can be made using Google Chrome, by submitting the address and login information. 

The report typically includes:  

  • Emissions data: The amount of CO2 emissions produced by the ship during a specific period,  calculated based on fuel consumption data. 
  • Transport work: The amount of cargo or passengers transported during the period covered by the report. 
  • CII calculation – current reporting year: The attained CII calculation and rating for the current reporting year.,  
  • CII calculation – voyage basis: The attained CII calculation and rating for voyages performed by the ship in the current reporting year. 
  • Comparison with industry averages: The CII value is compared with industry averages to assess the ship’s carbon efficiency relative to other vessels in the sector. 
  • Recommendations for improvement: Based on the CII calculation and visualization the report allows to have a clear picture of the conditions that allowed to reach better CII ratings.  
  • Monitoring and reporting information: Information on how the emissions data was collected and how the CII was calculated, as well as the frequency of monitoring and reporting.  

Attained CII per individual ship and CII projection to year end 


  • Collect validated data to automatically calculate and prepare CII reports 
  • Improved accuracy 
  • Enhanced compliance 
  • Improved data analytics 
  • Enhanced transparency 
  • Reduced reporting burden onboard 

Learn more about SERTICA VRS→

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Dimitris Zisimopoulos

RINA Digital Solutions
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DK-9200 Aalborg
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