CII Voyage Adjustments & Exclusions

Apply voyage-level adjustments and exclusions to raw DCS data before computing Attained CII - per MEPC.355(78): ice-class, SAR, safety distance, STS, cargo heating, shuttle tanker, cable-laying, and tanker cargo tank cleaning allowances.

IMOOperationalMEPC.355(78)

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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

I_\text{attained}^\text{adj} = \frac{\text{CO}_2^\text{total} - \text{CO}_2^\text{excl}}{(\text{Distance}^\text{total} - \text{Distance}^\text{excl}) \cdot \text{Capacity}}

Symbol	Meaning	Unit
$I_\text{attained}^\text{adj}$	Adjusted Attained CII	g CO₂ / (dwt·nm)
$\text{CO}_2^\text{total}$	Raw total CO₂ for the year	t
$\text{CO}_2^\text{excl}$	CO₂ emitted during excluded voyages	t
$\text{Distance}^\text{total}$	Raw distance	nm
$\text{Distance}^\text{excl}$	Distance excluded	nm
$Capacity$	DWT or GT per ship type

Source: IMO MEPC.355(78) - 2022 voyage adjustments guidelines

In short

Apply MEPC.355(78) voyage-level adjustments - ice, SAR, safety distance, STS, cargo heating, shuttle-tanker DP - before computing Attained CII.

Learn the theory BIMCO CII and Emissions Clauses