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FAQs on EETA

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Container ship

FAQs

Find answers to frequently asked questions on EETA:

What differentiates EETA from design based ratings (e.g. EEDI and RightShip GHG Rating)?

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The EETA approach compares vessels under the same operating conditions. All vessels of one size are compared at the same speed pattern. In contrast, design based ratings compare vessels under design conditions. Often, two vessels with the same cargo intake differ in design speed. As the formula behind design ratings such as EEDI and RightShip GHG Rating reduce efficiency performance of vessels with higher design speeds, it does not tell how a vessel with a higher and a vessel with a lower design speed compare in energy efficiency when sailing the same speed. The EETA approach has been developed to overcome this shortcoming. EETA is therefore the only operational, fact base on energy efficiency of vessels covering the entire world fleet of bulkers, tankers and container vessels.

Where do the technical data come from?

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EETA uses primarily technical data from the latest version of the IHS Maritime & Trade “World Register of Ships” database. Key technical data required for the EETA model are visible and can be checked against own information. In some cases, the entries in the IHS database are incomplete or wrong. Modifications made to the vessel after delivery may not have been reported to IHS and, thus, are unknown to DNV GL Maritime Advisory. You may send us an email to get the data change request form to be directed to IHS. For a particular analysis, we can also adjust numbers manually if you provide evidence that database entries are wrong. Please approach us if needed.

What operating profiles have been considered?

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The profiles, gradually differentiated by vessel size, are based on actual data of numerous representative vessels tracked by the Automatic Identification System (AIS) and reflect today’s slow steaming practice. EETA online displays the profile applied for the particular vessel.

How is the peer group defined?

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The peer group consists of all vessels of the world fleet the specific vessel could be competing with. It can be defined by setting filters, for example a bandwidth of cargo intake and main dimensions (beam, draft, LOA), design, cargo equipment, ice class and more.

How reliable are the results?

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The EETA approach is well tested and proven. Experts acknowledge it as the best-possible tool for a first outside-in assessment and fair global benchmarking on operational performance. For a percentage of vessels, the technical data from the IHS Maritime & Trade “World Register of Ships” database are incomplete or incorrect. This is the most relevant limitation of EETA. We encourage the user to check the key technical data displayed. If the deviation between vessel and peer group exceeds 15%, the EETA tool even shows a respective note. Whereas we can adjust numbers manually for a particular analysis, we encourage users to report correct data (with evidence) to IHS if they notice incomplete or incorrect data. You may send us an email to get the data change request form to be directed to IHS. Further limitations of reliability, such as deviations in operating profiles or the results of retrofit measures, are typically minor.