All vessels over 400 GT are required to calculate the "Attained EEDI" Energy Efficiency Design Index or the "Attained EEXI" Energy Efficiency Existing Ship Index and to carry the corresponding technical documentation in accordance with MARPOL Annex VI, Chapter 4. 

 A respective re-calculation of the EEDI or EEXI is always necessary if a structural change of the ship takes place that affects the dimensions, capacity or engine power of the ship, changes the type of ship, changes the ship to such an extent that it is considered a new ship or if a substantial change would lead to an exceedance of the calculated necessary EEXI / EEDI.  

Swiss Climate takes care of the calculation of the Attained EEXI or Attained EEDI, as well as the preparation of the technical documentation for the calculation according to the regulatory requirements.