CO2 Room - Upper Deck.
The CO2 room contains the gas cylinders for theCO2 flooding system used as the fixed fire fighting system on the Callaghan. It releases carbon dioxide to a protected space (such as engine room, cargo hold, pump room, etc.) under fire. When applied to a fire, CO2 provides a heavy blanket of gas that reduces the oxygen level to a point where combustion cannot occur.
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