Safety, Fire & Survival · Fire — High-Expansion Foam
High-expansion foam is particularly useful for:
- AFighting outdoor fires in high wind
- BQuickly filling an enclosed space (such as an engine room or hold) to smother a fire and exclude oxygen✓ Correct
- CCooling electrical switchboards directly
- DReplacing drinking water
Explanation
High-expansion foam expands enormously (hundreds to ~1000:1), so a modest amount of solution can flood a compartment, blanketing the fuel and excluding oxygen. It is suited to total-flooding of enclosed spaces but is less effective in open or windy conditions.
Authority: SOLAS II-2; FSS Code
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