š Key Concepts
⢠Motion of a vessel or tow around its vertical axis (turning left/right at the bow)
⢠Difference between lateral movement (sideways as a whole) vs. the bow swinging side to side
⢠Normal ship motions: pitch, roll, yaw, surge, sway, heave
š Think About
⢠Think about what happens when the bow of the tow swings off to one side and then back on the end of a towline. Which standard motion term describes that?
⢠Which option refers to the vesselās whole body sliding sideways without turning, and which refers specifically to turning left/right about a vertical axis?
⢠On a towline, when the tow veers from side to side, is it mostly rotating or just moving straight sideways?
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Before You Answer
⢠Match each choice to the standard 6 degrees of freedom: surge (foreāandāaft), sway (sideways), heave (upāandādown), roll, pitch, yaw.
⢠Ask yourself: is the question describing a turning/veering motion of the bow or a uniform sideways drift of the entire tow?
⢠Eliminate any term that clearly refers to foreāandāaft motion or to a motion that is not sideātoāside at the end of a towline.