What are the normal operating capacities for the LO sumo on the starboard and port sides?

• A. STBD- 1,752 GAL; PORT- 1,747 GAL
• B. STBD- 1,747 GAL; PORT- 1,752 GAL
• C. STBD- 1,700 GAL; PORT- 1,700 GAL
• D. STBD- 1,800 GAL; PORT- 1,800 GAL

Answer: (B)

Normal operating capacities are the designated fill levels kept in the LO sumps during normal operation. They aren’t the maximum the sump could hold, but the ready-to-use amounts that help ensure proper lubrication and ship stability. The two sumps aren’t identical because of how heavy components and piping are arranged on the ship, so each side has its own specified value to keep trim and balance within limits.

For this item, the port side is specified at 1,752 gallons and the starboard side at 1,747 gallons. The small difference (5 gallons) reflects the need to compensate for the asymmetric distribution of weight on the vessel, keeping the system prepared and stable. Therefore, the stated normal operating capacities are port 1,752 gallons and starboard 1,747 gallons.