单项选择题
A.Soundings B.Waypoints C.Meteorological data D.Radar targets
An ECDIS is required to display which information?（）A.R...
单项选择题An ECDIS is required to display which information?（）
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
A radar range to a small，charted object such as a light...
单项选择题A radar range to a small，charted object such as a light will provide a line of position in which form?（）.
A.Straight line B.Arc C.Parabola D.Hyperbola
