Question 4628 Deck General

The correct answer is D) 306.79 feet. When the contents of the Salt Water Ballast Tanks 1P and 1S are discharged, the free surface effect is reduced, causing the metacentric height (GM) to decrease. Discharging the ballast tanks reduces the free surface correction, resulting in a lower metacentric height. The given information indicates that the initial KMT is 375.38 feet, and the new metacentric height after discharging the ballast tanks can be calculated using the formula GM = KMT - KG - free surface correction, which results in a value of 306.79 feet. The other options are incorrect because they do not accurately reflect the change in metacentric height due to the reduction in free surface effect from discharging the ballast tanks.