The COASTAL DRILLER is loaded as shown in the Sample Load Form Number 1 (Rig Move). If the contents of 6 and 7 drill water tanks are discharged, what would be the new height of the longitudinal metacenter?
Official USCG Answer & Rule Citation
Correct Answer: Option C — 252.92 feet
Discharging consumable liquids from specific tanks alters the vessel's displacement and waterplane geometry. Removing the contents of drill water tanks 6 and 7 changes the longitudinal moments of inertia, thereby shifting the height of the longitudinal metacenter (ML) to a new calculated value of 252.92 feet.
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