Question 327Safety & Environmental - 1st Asst/Chief
70% to passAs 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?
ASurge
BHeave
CYaw
DSway
AI Explanation
The correct answer is D) Sway. Sway is the lateral motion of a vessel, which directly affects its lateral stability. The governing stability for a vessel is its ability to resist the lateral motion induced by external forces, such as winds and waves. Sway is the motion that causes the vessel to move side-to-side, and this motion has a direct impact on the vessel's overall lateral stability. The other options, such as surge (fore-and-aft motion), heave (vertical motion), and yaw (rotational motion about the vertical axis), do not directly affect the lateral stability of the vessel in the same way that sway does.
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