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Bunker Survey - Wedge Formula

Wedge-formula approximation for fuel volume in a trimmed tank - used when the tank is not fully level (typical sounding condition).

Bunker surveyWedgeROB
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Formula, assumptions, and limits

Vwedge12LwetdBV_{wedge} \approx \tfrac{1}{2} L_{wet} \cdot d \cdot B
SymbolMeaningUnit
ddSounding at low endm
LwetL_{wet}Wetted length along tankm
BBTank breadthm

Source: OCIMF - Oil Tanker Bunker Survey

In short

Wedge-formula approximation for fuel volume in a trimmed tank - used when the tank is not fully level (typical sounding condition).

Learn the theory Bunker Quality and ISO 8217 Marine Fuel Standards