The symbol shown in the illustration and used as a reference from which the height of the center of gravity is measured, is item number __________. SF-0022

Correct Answer: Option B — 2

Item number 2 on standard stability diagrams denotes the keel (K), which serves as the fundamental baseline reference point from which vertical heights, such as the height of the center of gravity (KG) and height of transverse metacentre (KM), are measured in naval architecture.