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DNV has announced that on 10th September it verified that two newbuildings at Oshima Shipyard in Japan have been built according to a guideline from IMO encouraging reduction of greenhouse gas emissions in shipping. This is the first time DNV has verified a ship's design efficiency index and issued a verification statement to this end.

The Energy Efficiency Design Index (EEDI) is a new technical measure intended to ensure a certain level of efficiency and decreased carbon emissions of newbuildings.

DNV was asked earlier this year by Oshima Shipyard to verify the EEDI for two of their vessels. The process, which was the first undertaking of DNV related to the EEDI, was concluded with the handing over of the EEDI Verification Statements at the yard on 10th September.

"The process included a survey on board the two vessels intended to verify and confirm the adopted design values for calculating the CO2 index. The final results were based on the vessels' main characteristics and engine performance as well as the design speed-power curves adjusted with the sea trial data provided by the builder," said Angelo Tossio, DNV principal surveyor.

The EEDI is one of the technical measures that have resulted from IMO's approach to limit CO2 emissions in shipping. More specifically the EEDI is intended to provide a measure of the energy efficiency of a vessel design, thus pushing the industry towards designing and building ships that will emit less CO2 when in operation. The index indicates the ratio between environmental impact and economic benefit and provides a benchmark against which ship efficiency may be evaluated.

The EEDI is currently not mandatory. However due to the stricter and more comprehensive rules and regulations currently being enforced for shipping, the measure is expected to become mandatory in the near future.