单项选择题
The vertical component of the Earth’s magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation? （）
A.The Flinders bar
B.The heeling magnet
C.Quadrantal soft iron spheres
D.Bar magnets in the binnacle
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相关考题
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单项选择题
The vertical angle between the horizontal and the magnetic line of force is the（）.
A.elevation
B.magnetic angle
C.vertical angle
D.dip -
单项选择题
The total magnetic effects which cause deviation of a vessel’s compass can be broken down into a series of components which are referred to as（）.
A.divisional parts
B.coefficients
C.fractional parts
D.equations -
单项选择题
The standard magnetic compass heading differs from the true heading by（）.
A.compass error
B.latitude
C.variation
D.deviation
