单项选择题
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
A radar display which is oriented，so that north is alwa...
单项选择题A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
A.relative display B.composite display C.stabilized display D.unstabilized display
