Energy Efficiency Design Index (EEDI) – shipowners’ experience

  • Published: 14th August 2017
  • Category: Consultations
  • Committee: Safety & Environment

At the IMO’s Marine Environment Protection Committee in July it was agreed that the early implementation of the Energy Efficiency Design Index (EEDI) phase 3 along with further reduction factors, should be considered.

During the session, the International Chamber said that before moving forward the experience of ships designed to optimise energy efficiency to achieve current EEDI phases should be examined. Anecdotal evidence suggests there are a number of operational issues and technical problems with such ships, including stern bush and shaft problems, caused by large propellers, excessive times to accelerate through barred speed ranges, rudder vibration and unduly low maximum power causing poor manoeuverability in adverse weather or in areas with strong currents.

Unless clear evidence can be presented to support these issues, there is a risk that further EEDI reductions will be implemented without adequately considering the implications for ship safety.

Members are therefore invited to provide specific information on their experiences of EEDI thus far. Responses should be sent to by 14 September.