While the DEEP DRILLER is loaded as shown in Sample Form #4 (Drilling), casing is accidentally dropped over the port side. Because the sounding level and port aft inclination are slowly increasing, you decide that tank 10P has minor damage. Among the possible corrective actions is __________.

Correct Answer: Option C — deballast from tank 9P

Mitigating minor asymmetrical flooding in an outboard space like tank 10P requires shifting ballast or deballasting from a symmetric longitudinal tank (such as tank 9P) to correct developing list and trim without worsening structural bending moments.