CII
Carbon Intensity Indicator
The Carbon Intensity Indicator (CII) is an operational indicator that measures how efficiently a ship transports passengers and/or goods. It is a mandatory measure for all cargo, Ro-Pax, and cruise vessels over 5,000 GT (gross tons) and trading internationally.
Its value, given in grams of carbon dioxide emitted per cargo-carrying capacity and nautical mile, is influenced by the type of fuel used, ship efficiency and operating parameters, such as ship speed, cargo capacity (DWT), weather and vessel conditions.
![](https://bound4blue.com/wp-content/uploads/2023/09/CII-image.png)
The ship is then given a rating on a scale of A, B, C, D, or E, where A represents the best performance level. Each ship needs to achieve a C rating or better. In the event of having a D rating for three consecutive years or an E rating one year, a corrective action plan to be on target should be developed and implemented.
The CII is evaluated annually – starting in January 2023 – with more restrictive emission limits each year.
![](https://bound4blue.com/wp-content/uploads/2023/05/tabla-CII.png)
Retrofitting a ship with eSAILs® not only improves the CII rating, but also expands the lifetime of vessels that otherwise would have become non-compliant.