ESI - Environmental Ship Index

Environmental Ship Index from NOx, SOx, CO₂ and OPS capability - major ports give port-due discounts for high ESI.

ESIPort duesGreen

Loading calculator…

This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

ESI = S_{NOx} + S_{SOx} + S_{CO_2} + S_{OPS}

Symbol	Meaning	Unit
$ESI$	Environmental Ship Index

Source: IAPH Environmental Ship Index

Environmental Ship Index from NOx, SOx, CO\u2082 and OPS capability - major ports give port-due discounts for high ESI.