A.Straight line
B.Arc
C.Parabola
D.Hyperbola
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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
A.Separated line
B.Divided line
C.Reference line
D.Segregated line
A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current
最新試題
（）the canal transit，the radar was operating.
Compass error is equal to the（）.
How is variation indicated on a small-scale nautical chart?（）.
An ECDIS is required to display which information?（）
A Doppler log in the bottom return mode indicates the（）.
（）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.
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?（）.
Deviation in a compass is caused by the（）.
The microsecond unit of time is used in radar applications. The microsecond represents which of the following?（）.