A.Relative
B.TRUE
C.Compass
D.Magnetic
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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
最新試題
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（）.
The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.
The number of pulses of energy transmitted per second is call the（）.
Compass deviation is caused by（）.
Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
A Doppler log in the volume reverberation mode indicates（）.
What will NOT induce errors into a doppler sonar log?（）
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.