英版海图某灯塔灯高69ft，该轮额定光力射程18nmile，你船眼高45ft，当气象能见度为10nmile时，该灯塔灯高最大可见距离为（）。_能见地平距离、物标能见距离和灯标射程_全学科试题题库

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英版海图某灯塔灯高69ft，该轮额定光力射程18nmile，你船眼高45ft，当气象能见度为10nmile时，该灯塔灯高最大可见距离为（）。
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