🔍 Key Concepts

• Link between a vessel’s Certificate of Inspection (COI) period and required servicing intervals for certain equipment • Specific maintenance/recharge requirements for foam fire extinguishers on inspected vessels in 46 CFR • Difference between time words: annually, semiannually, biennially, quarterly

💭 Think About

• Ask yourself: Does the regulation usually tie foam extinguisher recharge to every inspection, or more often than the inspection interval? • Think about how quickly foam solution can deteriorate compared with the COI period—would it be reasonable to go the entire 2‑year COI period without recharging? • Consider which option best matches a practical, safety‑oriented interval that regulators would likely choose for something that can degrade over time.

✅ Before You Answer

• Verify in 46 CFR that foam extinguishers have a specific recharge interval stated, not just a generic inspection requirement. • Check whether the rule says they must be recharged at least once during each COI period or on a fixed calendar interval (e.g., every year). • Confirm that the time term you choose (quarterly, semiannually, annually, biennially) exactly matches the wording and intent found in the regulation.