Which type of ship's fire safety system consists of pipes that go throughout the ship?

The fire safety system in question refers to the fire main, which is a crucial component in a ship's fire protection setup. The fire main consists of a network of pipes that are strategically installed throughout the ship to supply water for firefighting purposes. This system is designed to deliver water from a source, typically a pump, to various locations where firefighting equipment, such as fire hoses and hydrants, can be connected.

This design allows for quick and efficient access to water in the event of a fire, enabling crew members to respond promptly to extinguish fires effectively. The fire main is an integral part of the ship's overall safety architecture and is constantly maintained to ensure reliability.

In contrast, fixed systems typically refer to installations like sprinkler systems or other built-in fire suppression measures that activate automatically. Semi-portable systems involve equipment that can be moved within a certain area but are not designed for extensive coverage like the fire main system. Portable systems encompass items like handheld extinguishers that can be carried by crew members to fight fires in specific locations. However, none of these options possess the extensive network of pipes that characterizes the fire main system.