COW - Tank Cycle per MARPOL
Crude-Oil Washing tank cycle rate per MARPOL Annex I Reg. 33 - 25 % of cargo tanks per voyage minimum.
Tanks COW'd per voyage
3tanks
Formula, assumptions, and limits
$$n_{per voy} = \lceil 0.25 n_{total} \rceil$$
MARPOL Annex I Reg. 33 requires each cargo tank washed at least once per 4 months (approx. 25 % per voyage). Avoid ballasting into washed tanks. Record in Oil Record Book.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $n_total$ | Total cargo tanks | - | GA drawing |
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