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GHG Rating

The efficiency of a vessel is determined by the ratio of grams of CO2 emitted per tonne nautical mile. Vessel efficiency is determined using data from one of two sources:

  1. EEDI– is a regulatory requirement for new ships developed by the IMO (and applied to existing vessels on a case by case basis), or

  2. EVDI– is a rating system, developed by RightShip, that can be applied to new and existing vessel (where EEDI is not available or applicable).

A vessels relative performance is rated from A through G with the most efficient vessels receiving A ratings and the least efficient receiving G ratings Vessels are only compared to other similarly sized vessels of the same ship type. The peer group comparison is based on the number of standard deviations a vessel’s EEDI or EVDI varies from the average for similar sized vessels of the same ship type.

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Along with increasing transparency of energy efficiency, the key benefits of the GHG Rating include:

  • Assist the maritime industry transition to a low carbon economy through informed selection of more efficient ships,

  • Allows firms to benchmark and track emissions per journey and over time, giving them the ability to develop a baseline of emissions and an overall carbon-emissions target

  • Charterers can identify more efficient vessels and in-turn reduce their bunker bills

  • Ship-owners can benchmark their vessels against peer vessels to demonstrate the benefits of investing in efficiency

  • Financial institutions can reduce their risk by investing in efficient vessels ensuring a greater return on investment over the life of the asset.

  • Ports can reward efficient vessels through port incentive programs – reducing CO2 emissions and other criteria pollutants in port, and for the entire journey

To learn more about efficiency ratings go to site.rightship.com/ghg-rating/using-the-ghg-rating/