An ECDIS is required to display which information?（）

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

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

单项选择题A radar contact will remain stationary on a relative motion radar display only when it is（）.

A.on the same course as your vessel
B.at the same speed as your vessel
C.on the same course and speed as your vessel
D.on a reciprocal course at the same speed as your vessel