Question 2087 Deck Safety

The correct answer is C) the sum of the transverse free surface moments of the vessel. The correction to KG (vertical center of gravity) for transverse free surface effects is found by dividing the vessel's displacement into the sum of the transverse free surface moments of the vessel. This is because the free surface of liquids on board (such as in tanks) can cause a shift in the vessel's center of gravity, which must be accounted for in stability calculations. Dividing the displacement by the sum of the transverse free surface moments gives the correction factor to apply to KG. The other options are incorrect because they do not directly relate to the calculation of the transverse free surface correction. Option A refers to vertical moments, option B refers to the transverse baseline, and option D refers to the correction factor itself rather than how to calculate it.