Question 4431 Deck General

The correct answer is D) raise all legs simultaneously. When operating a liftboat and jacking down while free of the bottom, it is crucial to raise all legs simultaneously to maintain the vessel's stability and prevent any dangerous list or tipping. Raising all legs together ensures that the weight of the vessel is distributed evenly, keeping the liftboat level and preventing any sudden shifts in the center of gravity that could lead to an unstable or hazardous situation. The other options are incorrect because: A) having the crane standing upright is not directly related to the jacking down process, B) raising one leg at a time could cause the liftboat to list or become unstable, and C) the list is a critical factor that must be carefully managed during this operation.