Heavy-Lift / Project Cargo Ship CII
CII for heavy-lift ships (HLV) - specialised project-cargo carriers for wind turbines, refinery modules, mobile rigs. MEPC classifies them under general_cargo - tight CII targets for a trade that needs frequent full-power manoeuvring.
Ship & voyage
Fuel
Attained CII
13.840g CO₂ / (dwt·nm)
Required CII
12.276g CO₂ / (dwt·nm)
Rating
D
Minor inferior - corrective plan required after three consecutive years.
Formula, assumptions, and limits
$$\text{CII}_\text{required} = 31948 \cdot \text{DWT}^{-0.793} \cdot (1-Z)$$
Classified under general_cargo per MEPC.337. Heavy-lift operations involve DP positioning, ballasting, and crane power - the aux-engine CO₂ contribution is outsized and often underestimated. Cargo heating for some project cargoes also adds boiler fuel.
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