Abstract: A regulated pressurized system for use in an ambient fluid environment such as water and for mounting to an underwater vehicle, having at least one compressed fluid supply such as air in a tank. A pressure regulator is connected by tubing to the air tank, the regulator capable of regulating an outlet air pressure relative to an ambient pressure of the water. At least one main housing has at least one pressure relief valve connected by a tube to the pressure regulator. At least one electric control system is preferably provided contained within the main housing. A plurality of first peripheral housings are provided, each first peripheral housing having a first tube coupled to the main housing with the tubes having electric wires routed therethrough and interconnecting at least one first peripheral electric device to the main electric control system.