The CO2 firefighting system aboard ships represents the ultimate, last-resort defense against catastrophic engine room fires. When portable extinguishers and local suppression methods fail, this system activates as the final barrier. Its principle is rapid oxygen displacement; by flooding a protected space with inert CO2 gas, it smothers the flames chemically. For enclosed machinery spaces packed with fuel, lubricants, and electrical equipment, this fast-acting, non-damaging agent is indispensable. It can control a raging fire without harming sensitive machinery, buying critical time for crew evacuation and ultimately preserving the vessel's integrity. This system is not optional; it is the foundational pillar of a ship's survival strategy, making its reliability synonymous with the safety of all onboard.

Measuring liquid level in CO2 cylinders with portable ultrasonic liquid level indicator: