The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). What is the new metacentric height corrected for longitudinal free surface effects if the entire contents of salt water ballast 1anks 1P and 1S are discharged? (Use KML = 348.58)
Official USCG Answer & Rule Citation
Correct Answer: Option B — 279.37 feet
Correcting the metacentric height for longitudinal free surface effects involves subtracting the total longitudinal free surface moments divided by displacement from the initial GM, incorporating KML values per standard mobile offshore drilling unit (MODU) stability assessment procedures.
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