The vertical angle between the horizontal and the magnetic line of force is the().
A、elevation
B、magnetic angle
C、vertical angle
D、dip
A、elevation
B、magnetic angle
C、vertical angle
D、dip
A、vertical position B、horizontal position C、boom stop angle D、minimum radius angle
A、local hour angle B、azimuth angle C、meridian angle D、longitude
A、stability at all angles of inclination B、initial stability C、stability at angles less than the limit of positive stability D、stability at angles less than the downflooding angle
A、vertically above the center of buoyancy B、vertically above the center of gravity C、at the intersection of the upright vertical centerline and the line of action of the buoyant force D、at the geometric center of the underwater volume
A、vertically above the center of buoyancy B、vertically above the center of gravity C、at the intersection of the upright vertical centerline and the line of action of the buoyant force D、at the geometric center of the underwater volume
A、A.vertically above the center of buoyancy B、B.vertically above the center of gravity C、C.at the intersection of the upright vertical centerline and the line of action of the buoyant force D、D.at the geometric center of the underwater volume
A、Greenwich celestial meridian B、hour circle of the body C、local celestial meridian D、vertical circle of the body
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、decrease B、increase C、remain unchanged D、be changed by the amount of GG' x cosine of the angle