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 barometer showing falling pressure indicates the approach of a（）.
The minimum range at which a target can be detected is basically determined by which of the following?（）.
Compass deviation is caused by（）.
A deadhead is a(n)（）.
A radar range to a small，charted object such as a light will provide a line of position in which form?（）.
A radar display in which North is always at the top of the screen is a(n)（）.
The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.
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?（）
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?（）.