46 CFR §118.420

1. (a)A pre-engineered fixed gas fire extinguishing system must:
   1. (1)Be approved by the Commandant;
   2. (2)Be capable of manual actuation from outside the space in addition to automatic actuation by a heat detector;
   3. (3)Automatically shut down all power ventilation systems and all engines that draw intake air from within the protection space; and
   4. (4)Be installed in accordance with manufacturer's instructions.
2. (b)A vessel on which a pre-engineered fixed gas fire extinguishing system is installed must have the following equipment at the operating station:
   1. (1)A light to indicate discharge;
   2. (2)An audible alarm that sounds upon discharge; and
   3. (3)A means to reset devices used to automatically shut down ventilation systems and engines as required by paragraph (a)(3) of this section.
3. (c)Only one pre-engineered fixed gas fire extinguishing system is allowed to be installed in each space protected by such a system.