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 "transverse" stability? (See illustration.) RP0028

Illustration RP0028: the U.S. Coast Guard has not released this illustration.

Question

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 "transverse" stability? (See illustration.) RP0028

Illustration RP0028: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option A: Roll. Vessel roll represents the rotational motion about the longitudinal axis, directly influencing transverse stability, metacentric height, and righting arm characteristics during engineering operations at sea.