A.Water temperature
B.Climatology data
C.Speed of advance
D.Depth contours
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A.Soundings
B.Waypoints
C.Meteorological data
D.Radar targets
A.Radar targets
B.ARPA vectors
C.Hydrographic data
D.All of the above
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
最新試題
A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
A radar display in which North is always at the top of the screen is a(n)（）.
How is variation indicated on a small-scale nautical chart?（）.
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
An ECDIS is required to display which information?（）
Error may be introduced into a magnetic compass by（）.
The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.
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?（）.
Compass error is equal to the（）.
The minimum range at which a target can be detected is basically determined by which of the following?（）.