The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). What is the new height of the center of gravity corrected for longitudinal free surface effects if the entire contents of Salt Water Ballast Tanks 1P and 1S are discharged?
Official USCG Answer & Rule Citation
Correct Answer: Option D — 69.21 feet
Discharging saltwater ballast from specific tanks alters the total displacement and vertical moments. Recalculating total vertical moments divided by the new reduced displacement according to Sample Load Form #1 yields a corrected vertical center of gravity of 69.21 feet.
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