Question 2167 Deck Safety

The correct answer is D) M is not fixed at large angles. This is because at large angles of inclination, the value of the metacentric height (M) is not constant and can vary significantly. The metacentric height is the distance between the center of gravity (G) and the metacenter (M), which is the point where the buoyancy force acts. At large angles, the position of the metacenter changes, and it is no longer fixed relative to the ship's center of gravity. This means that the GM value, which is an indicator of a ship's initial stability, cannot be reliably used as an indicator of stability at all angles of inclination. The other options are incorrect because A) there is a G at large angles, even though its position may change, and B) G is not fixed at large angles, but this is not the primary reason why GM cannot be used as an indicator of stability at all angles.