A.deviation
B.variation
C.compass error
D.dip
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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
A.increases with latitude，being maximum at the geographic poles
B.decreases with latitude，being maximum at the geographic equator
C.is greatest when a vessel is near the Earth's magnetic equator
D.remains the same at all latitudes
最新試題
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
Which compensates for errors introduced when the vessel heels over（）.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
In more recent years，（）has been used by civilians in many new ways to determine positions，such as in automobile and boat navigation，hiking，emergency rescue，and precision agriculture and mining.
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?（）
What is an advantage of the magnetic compass aboard vessels?（）
The line which connects the points of zero magnetic dip is（）.
The most accurate method of determining gyrocompass error while underway is by（）.