Question 276Safety & Environmental - 1st Asst/Chief
70% to passThe motion of a vessel impacts its stability. Which of these motions shown in the illustration affects the governing "positional motion" stability? Illustration SF-0048
ASurge
BSway
CPitch
DHeave
AI Explanation
The correct answer is D) Heave. Heave is the vertical up-and-down motion of a vessel, which directly affects its positional stability. This is because the vessel's center of gravity moves up and down relative to the water, impacting the stability and balance of the vessel. The other motions listed - surge (forward/backward), sway (side-to-side), and pitch (bow up/down) - do not directly impact the vessel's positional stability in the same way as the heaving motion.
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