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
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相关考题
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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 -
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 -
单项选择题
A radar display in which North is always at the top of the screen is a(n)（）.
A.unstabilized display
B.stabilized display
C.composition display
D.relative display
