单项选择题

Which will NOT reduce yawing of a tow?（）

A.Increasing the length of the towing hawser
B.Trimming the tow by the bow
C.Trimming the tow by the stern
D.Drogues put over the stern

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单项选择题

Which statement is TRUE of a stiff vessel? （）

A.She will have a large metacentric height
B.Her period of roll will be large due to her large metacentric height
C.She will have an unusually high center of gravity
D.She will pitch heavily

单项选择题

Which statement is TRUE concerning hawser towing? （）

A.The catenary in a hawser should be sufficient so that the hawser just touches the bottom
B.The hawser is of sufficient length for towing when taut between tug and tow
C.Increasing speed usually increases the catenary in the hawser
D.Shortening the tow hawser generally decreases the maneuverability of the tug

单项选择题

Which statement is TRUE concerning a towing vessel which，due to the nature of her work，is unable to keep out of the way of another vessel?（）

A.By day，she shall carry a black cylinder shape
B.By day，she shall carry two black balls in a vertical line
C.By night，she would show the same lights as a vessel not under command
D.By day，she would show the same shapes as a vessel restricted in her ability to maneuver