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
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
Deviation is the angle between the（）.
What will NOT induce errors into a doppler sonar log?（）
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?（）.
A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
A radar range to a small，charted object such as a light will provide a line of position in which form?（）.
Error may be introduced into a magnetic compass by（）.
A radar display in which North is always at the top of the screen is a(n)（）.
（）is on the panel of radar.
A deadhead is a(n)（）.