As Chief Engineer or First Assistant Engineer you should be familiar with the six motions of a vessel. Which of these motions affects the governing "lateral motion" stability?

Correct Answer: Option D — Sway

Sway is the linear motion of a vessel along the transverse Y-axis. It is a primary component of lateral stability, influencing the vessel's response to beam seas and hydrodynamic forces. Understanding sway is essential for assessing the vessel's behavior during maneuvering and maintaining safe operational limits.