The DEEP DRILLER, while loaded as shown in the Sample Load Form #4 (Drilling), suffers damage to the starboard center column below the waterline. Pumping from tanks 2S and 9S is not sufficient to prevent increasing starboard list. You should consider counterflooding in tank __________.

Correct Answer: Option A — C2BP

Centerline or port counterflooding is mandatory to counteract asymmetric flooding on a damaged column. Tank C2BP provides the necessary transverse and longitudinal balancing moment on the port side to eliminate the dangerous starboard list per damage control procedures.