A、A.deviation
B、B.variation
C、C.compass error
D、D.dip
更多“The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is（）.”相关的问题
A、increases as the boom's angle to the horizontal increases B、is at a maximum when the boom is at a 45° angle to the horizontal C、increases as the boom's angle to the horizontal decreases D、decreases as the boom's angle to the horizontal decreases
A、increases as the angle to the horizontal increases B、increases as the angle to the horizontal decreases C、is greatest at an angle of 45° and decreases as the boom is raised or lowered D、is least at an angle of 45° and increases as the boom is raised or lowered
A、horizontal position of the boom B、vertical position of the boom C、horizontal position of the load being lifted D、vertical position of the load being lifted
A、the angle between the horizontal and the line of sight to the visible horizon B、index error C、parallax D、terrestrial refraction
A、geographic pole and the magnetic pole B、lubber's line and true north C、horizontal and the magnetic line of force D、compass heading and the magnetic heading
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