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
A.true meridian and the axis of the compass card
B.true meridian and the magnetic meridian
C.magnetic meridian and the axis of the compass card
D.axis of the compass card and the degaussing meridian
A.making a structural change to the vessel
B.a short circuit near the compass
C.belt buckles
D.All of the above
A.accurate only in the Polar regions
B.accurate electronic servomechanisms
C.hand operated
D.accurate only if the vessel is underway
A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts
A.radar
B.DF
C.Satellite Navigator
D.Automatic Omega Navigator
最新试题
Compass deviation is caused by().
A radar range to a small,charted object such as a light will provide a line of position in which form?().
What will NOT induce errors into a doppler sonar log?()
An electronic depth finder operates on the principle that().
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are().
An ECDIS is required to display which information?()
()the canal transit,the radar was operating.
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?().
How is variation indicated on a small-scale nautical chart?().
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE,MASTS,ETC means().