EEDI Reference line
This is a baseline EEDI for each ship type, representing reference EEDI as a function of ship size (see graph for Phase 0 in figure below). The reference lines are developed by the IMO using data from a large number of existing ships and analyzing this data. Full details of how reference lines are developed including sources of data, data quality checks, number of ships selected and year of build, ship sizes, etc. are fully described in relevant IMO guidelines (MariEMS 2017).