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Q3. a) IMO has introduced the EEXI requirements under MARPOL Annex VI Chapter IV for existing vessels from 2023 as a measure towards reduction of C02 emissions from shipping.

a) Explain the various design features adopted in the existing vessels to comply with the present EEXI which meets the EEXI framework under Phase 2 ( f 20% - 30% reduction).

b) Explain the concept of CII rating and critically discuss the role of measuring metrics of AER and EEOI. What are the measures required to be taken by the vessel to improve its CII ratings.