Question 2069 Deck Safety

The correct answer is D) The free surface correction decreases as the draft increases. The free surface correction accounts for the reduction in a vessel's righting moment caused by free surface of liquids in slack tanks. As the draft increases, the volume of the slack tank decreases relative to the total displacement of the vessel, causing the free surface correction to decrease. This is in accordance with the regulations and principles of ship stability. The other options are incorrect - option A is incorrect because the location of the slack tank relative to the KG does not affect the magnitude of the free surface correction. Option B is incorrect because the location of the slack tank on the centerline or off-center does not directly impact the free surface correction. Option C is incorrect because the free surface correction is always subtracted from GM, not added at light drafts and subtracted at deep drafts.