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Ro-Ro Vehicle Carrier (PCTC) CII

CII for Pure Car and Truck Carriers. MEPC.337 uses GT (not DWT) as capacity basis - reflects the low-density vehicle cargo. Reference line a=5739, c=0.631. Large PCTCs (8,000+ CEU) face tight rating bands under the MEPC.339 roro-cargo-vehicle d-vector.

Ship typePCTCRo-Ro
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Formula, assumptions, and limits

CIIrequired=5739GT0.631(1Z)\text{CII}_\text{required} = 5739 \cdot \text{GT}^{-0.631} \cdot (1 - Z)
SymbolMeaningUnit
GTGTGross tonnage
ZZAnnual reductionfraction

Source: IMO MEPC.337/338/339(76)

In short

CII for PCTCs (pure car and truck carriers) using MEPC.337 GT-based reference line.

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