The DEEP DRILLER, while loaded as shown in the Sample Load Form #4 (Drilling), suffers damage to the port center column below the waterline. Among the tanks from which you should pump is tank __________.

Correct Answer: Option A — 9P

Port center column damage causes a port list. Pumping ballast from tank 9P, located on the port side, lightens the affected side to counteract the list and restore an even keel in accordance with mobile offshore drilling unit stability criteria.