What is the function of the ship's fire main system?

• A. To circulate cooling water for engines.
• B. To provide potable water for the crew.
• C. To supply water for firefighting and ballast operations.
• D. To supply water for firefighting and damage control.

Answer: (D)

The fire main is a shipwide, pressurized water supply designed for emergencies. It provides ready access to large quantities of water for firefighting and for damage control tasks, such as cooling hot surfaces, washing areas, and, when needed under the damage control plan, flooding compartments to manage the spread of damage. It is separate from potable water systems and from engine cooling or ballast systems, which have their own dedicated sources and purposes. That’s why supplying water for firefighting and damage control best describes its function.