Engineering · Safety — Enclosed Spaces
Before entering an enclosed or confined space such as a double bottom or fuel tank, the most important precaution is to:
- AEnter quickly to minimize exposure
- BTest the atmosphere for oxygen, flammable, and toxic gases and ventilate as required✓ Correct
- CWear ordinary work clothes only
- DRely on holding your breath
Explanation
Enclosed spaces may be oxygen-deficient or contain toxic/flammable gases. The atmosphere must be tested and the space ventilated, an entry permit issued, and a standby attendant posted before entry.
Authority: Enclosed Space Entry (USCG engineering topic)
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