单选题某轮计划航向233°,陀罗差+2°.5,航速16kn,无风流中航行,预计利用航线左前方正横距离为7nmile的物标转向,采用正横方位转向,如果用四点方位法来确定转向时机,则应在物标陀罗方位为()时记录第一次观测时间,第一次观测后再航行()然后转向。A185°.5;7nmileB186°.5;3.5nmileC185°.5;3.5nmileD186°.5;7nmile
单选题
某轮计划航向233°,陀罗差+2°.5,航速16kn,无风流中航行,预计利用航线左前方正横距离为7nmile的物标转向,采用正横方位转向,如果用四点方位法来确定转向时机,则应在物标陀罗方位为()时记录第一次观测时间,第一次观测后再航行()然后转向。
A
185°.5;7nmile
B
186°.5;3.5nmile
C
185°.5;3.5nmile
D
186°.5;7nmile
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