Deck General · Fixed Fire Systems
When activating a fixed CO2 total flooding system, what must be done BEFORE releasing the CO2?
- AIncrease ventilation to clear smoke so firefighters can see inside
- BEnsure all personnel have evacuated the protected space and all ventilation openings are closed✓ Correct
- CPre-charge the space with dry chemical to knock down flame before CO2 floods
- DSound the general alarm and wait 30 seconds before pulling the release
Explanation
The correct sequence for a CO2 total flooding system is: sound the pre-discharge alarm, evacuate all personnel from the space, close all vents and openings to maximize agent concentration, then release the CO2. Leaving ventilation open dilutes the CO2 below its minimum design concentration and the fire will not be suppressed. Any personnel remaining in the space will be asphyxiated.
Authority: Firefighting (USCG deck topic)
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