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- Q516 - Engineering Safety & Environmental Protection
350. The motion of a vessel impacts its stability. Which of these motions shown in the illustration affects the governing «positional motion» stability
Heave is the correct answer. Positional stability concerns a vessel's vertical equilibrium, which is directly influenced by its vertical motion (heave). Surge and sway are horizontal translations, and pitch is a rotational motion; none directly affect vertical position.
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