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
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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
A.induced magnetism in vertical soft iron
B.induced magnetism in horizontal soft iron
C.permanent magnetism in ship's steel
D.vessel's inclination from the vertical
A.variation
B.deviation
C.compass error
D.bearing error
最新試題
When changing from a compass course to a true course you should apply（）.
What is the basic principle of the magnetic compass（）.
What is an advantage of the magnetic compass aboard vessels?（）
The quadrantal spheres are used to（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
The Flinders bar on a magnetic compass compensates for the（）.
The line which connects the points of zero magnetic dip is（）.