Question 5085 Deck General

The correct answer is C) jack back up and ballast the vessel's high side as necessary. The reasoning behind this is that when a liftboat experiences an unexpected list due to a flooded leg, the priority should be to restore the vessel's stability and prevent further loss of stability. Jacking back up the vessel and ballasting the high side will help re-establish the vessel's upright position and adequate stability. This is the safest and most appropriate course of action in this scenario. The other options are incorrect because: A) Proceeding with all legs half-raised may further compromise stability; B) Pumping out all ballast could actually decrease reserve buoyancy and make the situation worse; and D) Getting underway with the flooded leg only half-raised could lead to an unstable and potentially dangerous situation.