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
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
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 display in which North is always at the top of the screen is a(n)（）.
The minimum range at which a target can be detected is basically determined by which of the following?（）.
A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
A Doppler speed log indicates speed over ground（）.
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
An ECDIS is required to display which information?（）
Compass deviation is caused by（）.