A.north magnetic pole
B.south magnetic pole
C.magnetic prime vertical meridian
D.magnetic equator
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A.compass north
B.the direction of the vessel's head
C.magnetic north
D.a relative bearing taken with an azimuth circle
A.always shows true north direction
B.indicates the vessel's heading
C.is always parallel to the vessel's transom
D.is located on the compass card
A.deviation
B.variation
C.compass error
D.dip
A.damping error
B.ballistic deflection
C.quadrantal error
D.speed error
A.needles are nearly in line with the meridian
B.vessel is near the magnetic poles
C.variation is near zero
D.vessel is near the magnetic equator
最新試題
By convention，the north seeking ends of a compass’ magnets are colored（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
What is the basic principle of the magnetic compass（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.
Variation in a compass is caused by（）.
Variation is a compass error that you（）.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）