The DEEP DRILLER, loaded as shown in Sample Load Form #2 (Ballast to Survival), suffers major damage which results in flooding in tank C3S. Pumping from tanks in the vicinity of the damage have proven ineffective. Your best countermeasure is to __________.

Correct Answer: Option B — counterflood in 1P

Flooding in tank C3S (center aft lower hull) creates an aft trim and starboard list. Counterflooding tank 1P (port forward) restores transverse and longitudinal equilibrium by shifting the center of gravity diagonally opposite the flooded compartment, maintaining stability per stability booklet guidelines.