Environmental Ship Index Adds CO2 Performance to Assessments

by Ship & Bunker News Team
Monday July 3, 2017

The Port of Antwerp today announced that, as of July 1, the Environmental Ship Index (ESI) began evaluating CO2 performance, adding to existing assessments of NOx and SOx.

"This makes the index the first sustainable quality mark in international shipping that includes the performance and, more particularly, the reduction in CO2 in its assessment," said the port.

"The index does this based on historical data already included in the index."

The ESI compares fuel consumption against nautical miles travelled over the past three years to that of the following year.

"If relatively less fuel has been consumed – in other words, if sailing was more efficient – then less CO2 has been emitted," explained the port, noting: "ESI has chosen for this method because it is actually very difficult to measure CO2 emissions."

Ships that score high on ESI receive a premium from participating ports, such as Antwerp, as well as other organisations that reward sustainable shipping.