Question 4306 Deck General

The correct answer is D) 7.2 seconds. The minimum roll period that does not exceed the design limits of the legs for a single amplitude roll of 5 degrees is 7.2 seconds. This is based on the principle that the roll period should be long enough to prevent excessive dynamic forces on the offshore unit's legs, which could potentially exceed the design limits. The other options are incorrect because 2.7 seconds is too short, 4.0 seconds is still too short, and 6.5 seconds, while closer, does not fully satisfy the requirement to stay within the design limits for a 5-degree single amplitude roll.