The bilge system on a ship is designed primarily to

• A. To pump out water
• B. To monitor navigation
• C. To extinguish fires
• D. To provide navigation data

Answer: (A)

Water tends to collect in the bilge, the lowest part of the hull, from leaks, rain, and condensation. The bilge system uses pumps to remove that water and discharge it overboard (or into a settling tank), keeping the bilges dry so the ship remains buoyant and stable. The other functions described belong to separate systems: navigation monitoring and data come from navigational equipment, while extinguishing fires is handled by fire pumps and fire-suppressing systems. (In practice, bilge water may pass through an oil-water separator before discharge, but the main purpose is to remove water from the bilge.)