During onboard training with your engineers you review the various firefighting agents available for use onboard a ship. Which of the following statements describes carbon dioxide as an extinguishing agent?

Correct Answer: Option A — Carbon dioxide may be applied through a fixed or semi-fixed system, or from a portable extinguisher. It is useful for inserting a compartment or for putting out small local fires.

Carbon dioxide acts by displacing oxygen to extinguish fires. Fixed systems are designed to flood an entire compartment, while portable units target local fires. It is highly effective for Class B and C fires, provided the space can be sealed to maintain the necessary concentration for successful extinguishment.