A.Radar targets
B.ARPA vectors
C.Hydrographic data
D.All of the above
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A.beam
B.radar
C.light beacon
D.reflector
A.Straight line
B.Arc
C.Parabola
D.Hyperbola
A.relative display
B.composite display
C.stabilized display
D.unstabilized display
A.unstabilized display
B.stabilized display
C.composition display
D.relative display
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
最新試題
The minimum range at which a target can be detected is basically determined by which of the following?（）.
A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
（）the canal transit，the radar was operating.
Compass deviation is caused by（）.
Error may be introduced into a magnetic compass by（）.
An ECDIS is required to display which information?（）
A radar contact will remain stationary on a relative motion radar display only when it is（）.
An ECDIS is required to display which information?（）
An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes?（）.
What will NOT induce errors into a doppler sonar log?（）