As chief engineer you should understand the concept of corrective measures and their purpose. The following four actions will have which affect on the vessel? 1) Add weight low and symmetrically about the centerline. 2) Remove high weight symmetrically. 3) Move weight down symmetrically. 4) Eliminate any free surface present.

Correct Answer: Option D — To move the center of gravity down to a position below the metacenter and remove an angle of loll.

An angle of loll occurs when a vessel has negative initial stability (GM). Corrective measures focus on lowering the center of gravity (G) and eliminating free surface effects to increase the righting arm. Adding weight low and removing high weight restores positive GM, bringing the vessel back to an upright position.