单项选择题
A.Water temperature B.Climatology data C.Speed of advance D.Depth contours
An ECDIS is required to display which information?（）A.S...
单项选择题An ECDIS is required to display which information?（）
A.Soundings B.Waypoints C.Meteorological data D.Radar targets
An ECDIS is required to display which information?（）A.R...
A.Radar targets B.ARPA vectors C.Hydrographic data D.All of the above
A tall object with a light on or near the shore，to act ...
单项选择题A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
A.beam B.radar C.light beacon D.reflector
