Deck General USCG Question #4581 (Set 147)

Considering the changes to lightweight shown in Section 5 of the COASTAL DRILLER Manual, with the rotary 36 feet aft of the transom and 4 feet to port of the centerline, and with 300 kips in the setback, the maximum hook load is limited to __________.

Official USCG Answer & Rule Citation

Correct Answer: Option D — 314 kips

Longitudinal and transverse overturning moments restrict maximum allowable hook load on mobile offshore drilling units. Consulting Section 5 of the COASTAL DRILLER operating manual with specified setback weights and rotary offsets limits the capacity to 314 kips to preserve structural integrity.

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