单选题请问关于能见度不良时的安全航速,下列说法正确的是:()A能见度不良时的安全航速即为缓速B能见度不良时的安全航速即为备车航行的速度C只要船舶可用视觉看到来船,船舶就可以全速行驶D能见度不良时船舶采取的低航速未必是安全航速
单选题
请问关于能见度不良时的安全航速,下列说法正确的是:()
A
能见度不良时的安全航速即为缓速
B
能见度不良时的安全航速即为备车航行的速度
C
只要船舶可用视觉看到来船,船舶就可以全速行驶
D
能见度不良时船舶采取的低航速未必是安全航速
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