Ro-Pax Ferry CII

CII for Ro-Pax combination ferries. MEPC.353(78) Ro-Pax reference (a=2023, c=0.460), GT-based. Wider d-boundaries than most cargo types (d4=1.30), for schedule-constrained operations where slow steaming is rarely an option.

Ship typeRo-PaxFerry

Ship & voyage

Gross TonnageGTDistance / yearnmYear

Fuel

Many new Ro-Pax are LNG or LNG-hybrid (Stena, Finnlines, Viking Line).

FuelMasst

Attained CII: 13.701g CO₂ / (GT·nm)

Required CII: 13.322g CO₂ / (GT·nm)

Rating: C

Moderate performance.

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{CII}_\text{required} = 2023 \cdot \text{GT}^{-0.460} \cdot (1 - Z)

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

Source: IMO MEPC.353(78), MEPC.338(76) as amended by MEPC.400(83), and MEPC.354(78); Interferry - Ro-Pax decarbonisation study

In short

CII for Ro-Pax combination ferries using the MEPC.353(78) roro-passenger GT-based reference.

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