A.magnetron
B.receiver
C.indicator
D.modulator
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A.transmitter
B.antenna system
C.indicator
D.modulator
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
最新試題
A Doppler log in the bottom return mode indicates 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?（）.
What will NOT induce errors into a doppler sonar log?（）
An ECDIS is required to display which information?（）
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
How is variation indicated on a small-scale nautical chart?（）.
The number of pulses of energy transmitted per second is call the（）.
A Doppler speed log indicates speed over ground（）.
A tall object with a light on or near the shore，to act as a guide or warning to mariners is called（）.