The marine riser on the DEEP DRILLER should be disconnected if it appears the mooring line tensions will exceed 522 kips or the ball joint angle will exceed __________.
Official USCG Answer & Rule Citation
Correct Answer: Option D — 10°
Marine riser integrity management mandates precise operational limits for floating drilling units. The DEEP DRILLER operations manual requires immediate emergency disconnect procedures if environmental forces drive the marine riser ball joint angle past 10 degrees or mooring line tensions exceed 522 kips.
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