🔍 Key Concepts

• 46 CFR requirements for spare portable fire extinguishers • How spare extinguisher requirements are based on the total number of extinguishers of the same size/type • Whether there is a threshold number where spares become mandatory

💭 Think About

• Look up the table or paragraph in 46 CFR that explains how many spares are needed when you have multiple identical extinguishers. What does it say for 1–19 extinguishers of the same size? • Ask yourself: is the rule usually ‘one spare for each in service’ or ‘only a certain percentage or minimum number of spares’? • Consider whether CO₂ type and B-II size change the number of spares required, or if the rule is based only on how many extinguishers you have.

✅ Before You Answer

• Verify the exact CFR citation that covers spare portable extinguishers for inspected vessels (e.g., 46 CFR Part dealing with fire protection). • Confirm what the rule says for vessels carrying 10 B-II extinguishers: is it no spares, one spare, or a fraction/percentage of the total? • Make sure the requirement is for spare extinguishers, not just maintenance or recharging provisions.