單項選擇題

Horizontal transverse motion of a vessel is known as（）.

A.pitch
B.surge
C.sway
D.heave

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單項選擇題

Horizontal fore or aft motion of a vessel is known as（）.

A.pitch
B.surge
C.sway
D.roll

單項選擇題

Heave is motion along the（）.

A.longitudinal axis
B.transverse axis
C.vertical axis
D.centerline axis