561. 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?

To correct the 50,000 ft-tons of longitudinal moment, ballast must be transferred between tanks 1P and 10P. The required weight is calculated by dividing the trimming moment by the longitudinal distance between the tanks, which is approximately 212 feet, resulting in a ballast transfer of 236.1 long tons.