Class 1 (Chief Engineer) Engineering Management 📅 Oct 2022

Exam Question

IMO introduced the EEDI requirements under MARPOL Annex VI Chapter IV for new builds in 2013 as a measure toward the reduction of CO2 emissions from shipping. Explain the various design features adopted in the new build vessels to comply with the present EEDI framework under Phase 2 (of 20%-30% reduction).

Reference Answer

### Introduction to EEDI (Energy Efficiency Design Index)
The Energy Efficiency Design Index (EEDI) is a non-prescriptive, performance-based mechanism mandated by MARPOL Annex VI, Chapter 4, for new ships. It aims to promote the use of more energy-efficient equipment and engines. The EEDI requires a minimum energy efficiency level per capacity-mile (e.g., tonne-mile) for different ship types and sizes. The EEDI framework is being implemented in phases, with each phase demanding a stricter reduction in CO2 emissions compared to a baseline.
Phase 2, effective from 2020 to 2024, mandates a CO2 reduction factor of 20-30% depending on the ship type, compared to the reference line.
### EEDI Formula

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