The DEEP DRILLER is level at a draft of 58 feet when there are no environmental forces. What is the value of TCG?
Official USCG Answer & Rule Citation
Correct Answer: Option A — 0.00 on the centerline
Discharging liquid mud from mud pit #4 removes weight and alters vertical moments. Recalculating total vertical moments divided by the new displacement, combined with longitudinal free surface adjustments per stability booklet instructions, establishes the new corrected vertical center of gravity at 53.55 feet.
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