What system is permitted by Coast Guard Regulations for fire prevention and inerting cargo tanks on tank vessels?

An inert gas system is specifically designed to prevent fire and explosion hazards in cargo tanks on tank vessels by displacing the oxygen in the tanks with inert gases, such as nitrogen or flue gas. This system reduces the likelihood of combustion by maintaining an atmosphere that is not conducive to fire. According to Coast Guard Regulations, the use of an inert gas system is mandated on certain types of tankers, particularly those carrying flammable cargoes.

Inert gas systems not only help with fire prevention but also play a significant role in maintaining pressure within the tanks and preventing the ingress of seawater. By employing this system, operators can ensure a safer environment during loading, unloading, and while at sea.

Other systems mentioned, such as fire suppression, smoke detection, and water deluge systems, serve different purposes. While they are important for overall safety, they do not specifically address the inerting of cargo tanks in the manner required by the regulations. Fire suppression systems are used to extinguish fires once they have started, smoke detection systems provide early warnings of smoke presence, and water deluge systems are typically employed for cooling and preventing the spread of fire rather than inerting tanks. Thus, the inert gas system is the only appropriate choice for both fire prevention and inert