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General Cargo Ship CII

CII for multi-purpose / general-cargo ships. MEPC.337 reference (a=31948, c=0.793) - by far the steepest c exponent, meaning required CII drops fastest with capacity. Small general-cargo ships face strict per-tonne-mile targets.

Ship typeGeneral cargoMPV
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Formula, assumptions, and limits

CIIrequired=31948DWT0.793(1Z)\text{CII}_\text{required} = 31948 \cdot \text{DWT}^{-0.793} \cdot (1 - Z)
SymbolMeaningUnit
DWTDWTDeadweightt
ZZAnnual reductionfraction

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

In short

CII for general-cargo and multi-purpose vessels using the MEPC.337 general-cargo reference.

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