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
A barometer showing falling pressure indicates the approach of a（）.
The number of pulses of energy transmitted per second is call the（）.
A Doppler log in the bottom return mode indicates the（）.
How is variation indicated on a small-scale nautical chart?（）.
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
（）should be used during the poor visibility if the radar’s screen shows heavy sea returns.
A radar display in which North is always at the top of the screen is a(n)（）.
An ECDIS is required to display which information?（）
The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.
You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.