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Slow Steaming - Fuel Savings per Voyage

Fuel savings from reducing voyage speed - cubic-law estimate compared to baseline speed over a fixed route.

Slow steamingVoyageDecarb
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Formula, assumptions, and limits

Δm=FOC0DV0FOC0(VV0)3DV\Delta m = \text{FOC}_0 \cdot \frac{D}{V_0} - \text{FOC}_0 \cdot \left(\frac{V}{V_0}\right)^3 \cdot \frac{D}{V}
SymbolMeaningUnit
V0V_0Baseline speedkn
VVReduced speedkn
FOC0\text{FOC}_0Baseline fuel consumptiont/day

Source: IMO MEPC.65 - Slow Steaming guidance

In short

Fuel savings from reducing voyage speed - cubic-law estimate compared to baseline speed over a fixed route.

Learn the theory Voyage Estimation: TCE, Bunkers, and Canal Economics