单项选择题
A.elevation B.magnetic angle C.vertical angle D.dip
The total magnetic effects which cause deviation of a v...
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
The standard magnetic compass heading differs from the ...
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
The reaction of a gyrocompass to an applied force is kn...
单项选择题The reaction of a gyrocompass to an applied force is known as（）.
A.precession B.earth rate C.gyroscopic inertia D.gravity effect
