Deck General USCG Question #3381 (Set 108)

The COASTAL DRILLER is experiencing a single amplitude roll angle of 2 degrees and a roll period of 10 seconds. What is the maximum recommended water depth for elevating?

Official USCG Answer & Rule Citation

Correct Answer: Option C — 150 feet

Mobile offshore drilling unit operating manuals establish limiting metacentric heights and dynamic roll criteria for jacking operations. Based on standard operational envelopes for a roll angle of 2 degrees and a 10-second period, the maximum recommended depth is 150 feet.

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