A.transmitter
B.antenna system
C.indicator
D.modulator
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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
A.vessel's geographic position
B.vessel's heading
C.earth's magnetic field
D.influence of the magnetic materials of the vessel
最新試題
A Doppler speed log indicates speed over ground（）.
A radar display in which North is always at the top of the screen is a(n)（）.
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（）.
The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.
Error may be introduced into a magnetic compass by（）.
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?（）.
Compass error is equal to the（）.
The minimum range at which a target can be detected is basically determined by which of the following?（）.
A Doppler log in the bottom return mode indicates the（）.