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 log in the bottom return mode indicates the（）.
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.
A Doppler log in the volume reverberation mode indicates（）.
A deadhead is a(n)（）.
An ECDIS is required to display which information?（）
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
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（）.
An ECDIS is required to display which information?（）
Error may be introduced into a magnetic compass by（）.