A.As many as
B.So many as
C.As much as
D.As more as
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A.Increased draft
B.Pitch
C.Roll
D.Change in trim
A.one-millionth part of a second
B.one-thousandth part of a second
C.one-hundredth part of a second
D.one-tenth part of a second
A.persistence
B.pulse repetition rate
C.pulse length
D.rotation rate
A.carrier frequency
B.pulse repetition rate
C.pulse length
D.pulse repetition time
A.magnetron
B.receiver
C.indicator
D.modulator
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（）.
The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
A Doppler speed log indicates speed over ground（）.
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
（）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.
A radar contact will remain stationary on a relative motion radar display only when it is（）.
A radar range to a small，charted object such as a light will provide a line of position in which form?（）.
A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
What will NOT induce errors into a doppler sonar log?（）