单项选择题
A.SHLW B.SCTD C.OBS D.SW
The Routing System which aimed at reducing the risk of ...
单项选择题The Routing System which aimed at reducing the risk of casualties is called as（）.
A.Traffic Separation Schemes B.Recommended tracks C.Precautionary areas D.Inshore traffic zones
When winds of force reach 10-11 in Beaufort Scale，usual...
单项选择题When winds of force reach 10-11 in Beaufort Scale，usually we call such winds as（）.
A.Hurricane B.Breeze C.Storm D.Gale
