Your vessel is damaged and partially flooded. It is listing 12° to port and trimmed 8 feet down by the head. It has a long, slow, sluggish roll. Which action should you take FIRST?
• Effect of free surface in slack tanks on vessel stability • Difference between correcting list (heel) and trim (bow or stern down) conditions • How weight removal vs. weight addition low and on centerline affects GM (metacentric height) and rolling period
• Ask which condition is most dangerous right now: the list, the trim, or the long, slow roll, and what that long, slow roll tells you about stability. • Look at each option and decide whether it mainly changes list, trim, or stability (GM), and whether it risks making free surface worse or better. • Consider which single action could quickly improve stability without dangerously increasing trim or list in the short term.
• Identify which option deals with a slack tank on the centerline and what pressing it up does to free surface. • Check which actions involve removing weight high and off centerline and how that would affect the list and GM. • Confirm which option directly reduces the risk associated with a long, slow, sluggish roll (indication of low GM and poor stability).
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