Question 2034 Deck Safety

The correct answer is C) decrease. When the vertical center of gravity (VCG) of a ship rises, the righting arm (GZ) for the various angles of inclination will decrease. This is because as the VCG rises, the distance between the center of gravity (G) and the center of buoyancy (B) decreases, reducing the righting moment (GZ) that acts to restore the ship to an upright position. The other options are incorrect because: A) The formula GG' x cosine of the angle is not applicable in this case, as it relates to the change in GZ due to a shift in the center of gravity, not a change in the VCG. B) The righting arm (GZ) will not remain unchanged, as it is directly affected by the change in VCG. D) The righting arm (GZ) will decrease, not increase, when the VCG rises.