When your vessel is proceeding to the area of traffic density,()is used to determine the exact ranges of other ships or objects in the vicinity.
A.radar
B.GPS
C.DF
D.satellite navigator
参考答案:A
When your vessel is proceeding to the area of traffic density,()is used to determine the exact ranges of other ships or objects in the vicinity.
A.radar
B.GPS
C.DF
D.satellite navigator
参考答案:A