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Which error grows in astrolabe calculations when sights become oblique?

A)Index line parallax expands
B)Alidade shadow errors amplify
C)Mater plate warpage worsens
D)Star altitude estimations drift

💡 Explanation

Error increases because angular measurements degrade through increased alidade shadow length during oblique sightings. This leverages similar triangles because small variations influence angles calculations; therefore, shadow errors amplify rather than mechanical warpage dominating overall precision.

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