🔍 Key Concepts

• 46 CFR requirements for fixed foam extinguishing systems on cargo and miscellaneous vessels • What the regulations say about minimum foam supply duration versus maintenance/testing intervals • Relationship (if any) between a deck foam system and an internal fixed foam system

💭 Think About

• Look for which option sounds like it comes from a specific, measurable design requirement (e.g., time of operation) rather than from a maintenance schedule someone might have guessed. • Compare the options that talk about discharge and recharge of foam chemicals: does 46 CFR usually require completely dumping foam concentrate on a fixed time schedule, or does it require other kinds of periodic checks? • Ask yourself whether the regulations are more concerned with making sure there is enough foam available during a fire or with forcing full replacement of foam concentrate on a strict calendar.

✅ Before You Answer

• Check 46 CFR (Subchapter I) sections on fire-extinguishing systems for the exact wording on fixed foam systems and note any minimum operating time specified. • Verify whether 46 CFR actually mandates that foam concentrates be fully discharged and recharged at each annual or biennial inspection, or if it instead requires testing/sampling of the foam. • Confirm whether the regs state that a deck foam system must be completely independent of the fixed foam system, or whether they allow shared components or are silent on that point.