Question 3503 Deck General

70% to pass

The DEEP DRILLER is under tow at a 20 foot draft. The rig motions are close to exceeding the limits for critical pitch and roll. The rig is also experiencing occasional pounding on the horizontal braces. In this situation you should _______________.

A wait until pitch and roll exceed the limits before ballasting down
B ballast up to a 15 foot draft and check vessel motions
C ballast down to a 45 foot draft and check vessel motions
D shorten the tow wire for a smoother tow
AI Explanation

The correct answer is C) ballast down to a 45 foot draft and check vessel motions. The reasoning is that when a vessel is experiencing excessive pitch and roll motions, as well as pounding on the horizontal braces, the proper action is to ballast the vessel down to increase its draft and improve stability. Ballasting down to a 45 foot draft will lower the vessel's center of gravity, which will help dampen the excessive motions and reduce the pounding. This is in line with standard vessel handling procedures to address these types of motion issues. The other options are incorrect because waiting until the limits are exceeded (A) is too late and could lead to damage, and ballasting up (B) would actually make the stability and motions worse. Shortening the tow wire (D) may provide a smoother tow, but does not address the underlying stability and motion problems.

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