Coast Guard Regulations permit which of the following systems to be used for fire prevention and the simultaneous inerting of cargo tanks on tank vessels?

Correct Answer: Option D — An inert gas system

Coast Guard regulations under 46 CFR Subchapter D mandate the use of an inert gas system (IGS) to prevent fires and explosions by continuously maintaining a non-flammable atmosphere inside the cargo tanks during all phases of cargo and ballasting operations.