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Superyacht Fuel & CO₂

Yachts 30–180 m. Outside CII scope but increasingly audited by owners and charterers against a CO₂-per-day or per-guest-night intensity.

Ship typeYachtSuperyacht
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Formula, assumptions, and limits

CO2year=jFjCf,j\text{CO}_2^\text{year} = \sum_j F_j \cdot C_{f,j}
SymbolMeaningUnit
FjF_jMass of fuel jjt
Cf,jC_{f,j}CO₂ factort CO₂ / t fuel
Bench(Runningdays/year)Bench (Running days / year)operational benchmarkd
dopd_\text{op}Operating daysd

Source: SYBAss YETI - Yacht Environmental Transparency Index; IMO MEPC.364(79) - Cf conversion factors