Question 5072 Deck General
70% to passA semisubmersible rig under tow should be ballasted down if _______________.
A
period of roll exceeds 12 seconds
B
forward progress is halted by head wind
C
water begins to break over the pontoons
D
motion begins to be excessive
AI Explanation
The correct answer is D) motion begins to be excessive. When a semisubmersible rig is under tow, it is important to monitor the rig's motion and take action if the motion becomes excessive. Ballasting down the rig can help stabilize it and reduce the motion, which is important for the safety of the tow and the personnel on board. The other answer choices are not directly related to the need to ballast down the rig when the motion becomes excessive.
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