While drilling loaded as shown in Sample Load Form Number 4 (Drilling), the DEEP DRILLER suffers a sudden unexpected starboard and aft inclination. The wind and waves are light. What might have caused the inclination?

Question

Accepted Answer

The drilling crew has dumped the mud.

Answer

The drill string has broken.

Answer

Ballast tanks have equalized into tank 10S.

Answer

Mooring lines 6 and 7 have failed.

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