Tankerman · Regulations — OPA 90 Double Hull
Under OPA 90, tank vessels carrying oil in U.S. waters are generally required to have:
- AA single hull with extra paint
- BWooden sheathing
- CA double hull (double bottom and wing tanks)✓ Correct
- DNo special hull requirement
Explanation
The Oil Pollution Act of 1990 mandated double hulls for tank vessels operating in U.S. waters, with a phase-out schedule that retired most single-hull tankers/barges. The double hull reduces outflow if the outer shell is breached in a grounding or collision.
Authority: OPA 90; 46 CFR Subchapter D
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