Question 2188 Deck Safety

The correct answer is B) KG is minimum. The righting arm is equal to the distance between the center of gravity (G) and the metacenter (M), which is represented as the GM (metacentric height). For a given displacement, the righting arm will be maximized when the center of gravity (KG) is at its lowest position, as this will result in the largest GM and, consequently, the maximum righting arm. The other options are incorrect because: A) KM being a minimum does not necessarily mean the righting arm is maximized, as KG is also a factor; C) small-angle stability applies regardless of the righting arm's maximum value; and D) the angle of inclination does not directly determine the maximum righting arm, which is a function of the GM.