Question 4447 Deck General

The correct answer is B) 8.0 seconds. This answer is correct because the minimum roll period that does not exceed the design limits of the legs is based on the relationship between the vessel's roll angle and roll period. For a single amplitude roll of 6 degrees, the minimum roll period to avoid exceeding the design limits is 8.0 seconds. The other answer choices are incorrect because 10.5 seconds is too long, 4.5 seconds is too short, and 1.0 second is significantly too short for the given roll angle of 6 degrees. The 8.0 second roll period is the appropriate value that ensures the vessel's roll motion remains within the design limits of the legs.