A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has().

A . error of perpendicularity B . side error C . prismatic error D . centering error

时间:2022-09-02 06:39:24 所属题库:天文航海题库

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