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Environmental Ship Index

The Environmental Ship Index (ESI) measures a ship’s emissions based on the amount of nitrogen oxide (NOx), sulphur oxide (SOx), particulate matter (PM) and greenhouse gas it releases. ESI is used as a good indication of the environmental performance of ocean going vessels or ships.

Ports plan to reward ships when they comply or meet lower than current International Maritime Organization emission standards. Although this is a completely voluntary program, ports hope the incentives motivate the global port community to assume its role in improving the environment seriously.

Project Port: Port of Rotterdam Authority

Participating Ports: Port of Amsterdam, Port of Antwerp, Ports of Bremen/Bremerhaven, Hamburg Port Authority, Grand Port Maritime du Havre

Environmental Ship Index Brochure produced by the Working Group


Maritime environmental issues – regulations, monitoring and benchmarking - November 16-18, 2009
Eirik Nyhus
Director, Environment
Det Norske Veritas

Environmental policy drivers: is ESI one of them? - November 16-18, 2009
Lars Robert Pedersen
Director of Regulatory Affairs & Compliance Technical Organization
A.P. Moller-Maersk Group

Environmental Ship Index - November 16-18, 2009
Tiedo Vellinga
WPCI-ESI Teamleader
Director of Environment, Safety & Spatial Planning
Port of Rotterdam Authority

Environmental Ship Index - November 23-25, 2008
Tiedo Vellinga
Director of Environment, Safety & Spatial Planning
Port of Rotterdam Authority

Incentives for Clean Shipping - July 9-11, 2008
Peter Mollema
Director of Port Planning & Development
Port of Rotterdam Authority