Crude Oil Wash - Volume Budget
COW crude-oil volume required for a cargo-tank wash - empirical for ISGOTT 6 / MARPOL Reg. 33.
Crude wash volume
62.5m³
Formula, assumptions, and limits
$$V = A \cdot q$$
MARPOL mandates COW on 25 % of ballast tanks per voyage (crude carriers); single-crude wash 25 % is acceptable. Volume not lost - recirculates to cargo tank.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $A$ | Tank internal surface area | m² | capacity plan |
| $q$ | Wash volume per unit area | L/m² | ISGOTT |
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