As chief engineer or first assistant...

Question 1 of 31048VMtKdXTC8LwyNCRsa0hn

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 "longitudinal" stability?

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Question 1 of 31048

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 "longitudinal" stability?

🔍 Key Concepts

• The difference between transverse stability (side-to-side) and longitudinal stability (end-to-end). • How each motion (pitch, heave, surge, yaw) moves the ship: vertical, fore‑and‑aft, rotational, or sideways. • Which motion changes the trim between the bow and stern rather than the list from port to starboard.

💭 Think About

• Visualize the ship from the side: which motion clearly changes how much the bow or stern goes up and down relative to the water? • Think about which motion affects trim (difference in draft forward and aft), since trim is directly related to longitudinal stability. • For each choice, ask: is this mainly about movement along an axis, or rotation around an axis? And is that axis fore‑and‑aft, athwartships (side-to-side), or vertical?

✅ Before You Answer

• Be clear on the ship’s three main axes: longitudinal (bow to stern), transverse (port to starboard), and vertical (keel to mast). • Match each motion to its axis and whether it is rotation or translation before picking an answer. • Confirm which motion would be most noticeable to someone standing at the bow watching the bow and stern alternately rise and fall.