EEDI Reference Line

Look up the baseline reference line for any ship type - a × Capacity^(−c) per MEPC.231(65)/328(76). Applies to EEDI and EEXI attained/required calculations.

IMODesignReference line

Loading calculator…

This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{Reference} = a \cdot \text{Capacity}^{-c}

Symbol	Meaning	Unit
$Reference$	Reference-line value	g CO₂ / (t·nm)
$a$	Ship-type constant
$c$	Ship-type exponent
$Capacity$	DWT or GT per ship type

Source: IMO MEPC.231(65); IMO MEPC.328(76)

In short

Look up the a, c coefficients and compute the EEDI reference line for any ship type and capacity per MEPC.231(65)/328(76).

Learn the theory BIMCO CII and Emissions Clauses