Your ship has a low pressure carbon dioxide system that covers the engine room. Fire has been reported in the engine room and the decision has been made to dump the carbon dioxide system into the engine room. While following the procedures to release carbon dioxide you find one engine room supply fan damper that will not close. How should you proceed?

Correct Answer: Option D — Cover the fan damper opening with a plastic tarp to stop the flow of air into the engine room and then continue with the release procedures.

Maintaining space tightness is critical for effective total flooding fire suppression. If a ventilation damper fails to close automatically, immediately sealing the physical opening with an impermeable barrier like a heavy-duty plastic tarp prevents air infiltration that could sustain combustion.