The DEEP DRILLER, at a draft of 60 feet, has 50,000 ft-tons of longitudinal moments. How much ballast should be transferred between tanks 1P and 10P to level the unit longitudinally?

Correct Answer: Option D — 236.1 long tons

Dividing the total required longitudinal correction moment (50,000 ft-tons) by the arm distance between tanks 1P and 10P yields the required transferred weight of 236.1 long tons to restore the vessel to an even keel.