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
Error may be introduced into a magnetic compass by（）.
A FICTIVE LINE DISPLAYED ON THE RADAR SCREEN SEPARATING THE FAIRWAY FOR INBOUND AND OUTBOUND VESSELS SO THAT THEY CAN SAFELY PASS EACH OTHER defines（）.
A Doppler log in the bottom return mode indicates the（）.
Compass deviation is caused by（）.
（）should be used during the poor visibility if the radar’s screen shows heavy sea returns.
A Doppler log in the volume reverberation mode indicates（）.
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?（）.
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（）.
An electronic depth finder operates on the principle that（）.