Aboard a cargo vessel, the carbon dioxide...

🔍 Key Concepts

• Fixed CO₂ fire-extinguishing systems on cargo ships under 46 CFR (engine room vs. cargo holds) • How regulations size a total-flooding CO₂ system: it is based on the single largest protected space served by that system • Difference between protecting one largest space vs. all spaces simultaneously

💭 Think About

• Ask yourself: Is a fixed CO₂ system on a cargo ship required to be sized to flood every protected space at once, or just to deal with the worst-case single space? • Which space will normally require the greatest quantity of CO₂—the largest machinery space, the largest cargo space, or some combination? • Look at the wording: is the requirement about specific named spaces (like engine room + one hold) or about the space that demands the most CO₂ in that system?

✅ Before You Answer

• Check in 46 CFR for how the capacity of a fixed CO₂ system is determined—does it say it must protect all spaces simultaneously or the space requiring the greatest amount? • Verify whether a single fixed system commonly serves multiple cargo spaces and/or machinery spaces, and how its minimum bottle capacity is defined. • Confirm that the rule is talking about minimum required CO₂ quantity, not about which spaces must be fitted with CO₂ protection.

Aboard a cargo vessel, the carbon dioxide supply used in a fixed extinguishing system MUST at least be sufficient for what space(s)?

The engine room and largest cargo space

All the spaces of a vessel

The space requiring the greatest amount

All cargo spaces

🔍 Key Concepts

💭 Think About

✅ Before You Answer