Question 4725 Deck General

The correct answer is C) synchronous rolling occurs. When the wave period and the apparent rolling period of the MODU (Mobile Offshore Drilling Unit) are the same, it can lead to a phenomenon called synchronous rolling. In this situation, the waves and the MODU's natural rolling motion become synchronized, causing the roll amplitude to increase significantly. This can be a dangerous situation, as the increased roll amplitude can put stress on the MODU's structure and make it more susceptible to capsizing. The other answer choices are incorrect because: A) the roll period would not increase, as the synchronous rolling would lead to an increase in roll amplitude; B) the roll amplitude is not dampened, but instead amplified; and D) the roll period would not decrease, as the synchronous rolling is caused by the matching of the wave period and the MODU's natural rolling period.