A.magnetron
B.receiver
C.indicator
D.modulator
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A.transmitter
B.antenna system
C.indicator
D.modulator
A.persistence
B.pulse repetition rate
C.pulse length
D.resolution
A.Relative
B.TRUE
C.Compass
D.Magnetic
A.magnetism from the earth's magnetic field
B.misalignment of the compass
C.magnetism within the vessel
D.a dirty compass housing
A.deviation minus variation
B.variation plus compass course
C.combined variation and deviation
D.difference between true and magnetic heading
最新試題
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
A Doppler speed log indicates speed over ground（）.
What will NOT induce errors into a doppler sonar log?（）
A radar display in which North is always at the top of the screen is a(n)（）.
The number of pulses of energy transmitted per second is call the（）.
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 contact will remain stationary on a relative motion radar display only when it is（）.
（）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.
The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.