Question 168Safety & Environmental - Assistant Engineer

The correct answer is D) rolling. Rolling refers to the angular movement of a vessel about a horizontal line drawn from its bow to its stern. This is one of the six degrees of freedom that a vessel experiences, along with pitching, yawing, heaving, surging, and swaying. The other answer choices are incorrect: - Heaving is the vertical motion of the vessel up and down, - Pitching is the angular motion about a horizontal axis perpendicular to the keel, and - Swaying is the sideways motion of the vessel.