Buoyancy associated with empty or partly empty ballast tanks in the mat of a mat supported jack-up MODU during jacking operations can cause __________.

Correct Answer: Option C — capsizing

Uncontrolled free surface and buoyancy within empty or slack ballast tanks inside a bottom mat during jacking operations can induce sudden loss of positive stability, uneven bottom soil suction, and catastrophic capsizing of the mobile offshore drilling unit.