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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().

发布日期:2021-03-22

A marine sextant has the index arm set at zero and...
A

error of perpendicularity

B

side error

C

prismatic error

D

centering error

标签: marine sextant index arm set

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