数，建立了让路船避让转向幅度优化模型。
An optimization model of course alteration degree is proposed.
两船的一船应给另一船让路时，另一船应保持航向和航速。
Where one of two vessels is to keep out or the way the other shall keep her course and speed.
有关拖船因为其工作性质不能给他船让路的报告哪一个精确？在白天，她应呈现与操限船雷同的号型。
D. By day, she would show the same shapes as a vessel restricted in her ability to maneuver.
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