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
Error may be introduced into a magnetic compass by（）.
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
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?（）.
An ECDIS is required to display which information?（）
You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.
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?（）.
Compass error is equal to the（）.
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
What will NOT induce errors into a doppler sonar log?（）