Ro-Pax Ferry CII

CII for Ro-Pax combination ferries. MEPC.337 Ro-Pax reference (a=7540, c=0.587), GT-based. Widest d-boundaries of any ship type (d4=1.41) to accommodate schedule-constrained operations where slow-steaming isn't an option.

Ship typeRo-PaxFerry

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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

\text{CII}_\text{required} = 7540 \cdot \text{GT}^{-0.587} \cdot (1 - Z)

Symbol	Meaning	Unit
$GT$	Gross tonnage
$Z$	Annual reduction	fraction

Source: IMO MEPC.337/338/339(76); Interferry - Ro-Pax decarbonisation study

In short

CII for Ro-Pax combination ferries using the MEPC.337 roro-passenger GT-based reference.

Learn the theory Specialised Ship Types: Ro-ro, Reefer, Heavy-Lift