A.unstabilized display
B.stabilized display
C.composition display
D.relative display
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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
A.speed being made good
B.speed through the water
C.the set of the current
D.the depth of the water
A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground
最新試題
What will NOT induce errors into a doppler sonar log?（）
The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
A radar contact will remain stationary on a relative motion radar display only when it is（）.
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
Compass error is equal to the（）.
Deviation in a compass is caused by the（）.
（）should be used during the poor visibility if the radar’s screen shows heavy sea returns.
A deadhead is a(n)（）.
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?（）.